Dehumidifier waterworks water supply

Waterworks and water supply –
definition and description

Waterworks serve to treat and distribute drinking water. High-quality, technical equipment is required to provide pure water – it has to comply with the strictest food laws. 

The technical devices include pumps, filters, water storage tanks, switch rooms and fittings. 

Reservoir and dam

By the cool surface temperature of the lines and by the large difference to the ambient temperature is the formation of condensation, which colloquially often condensation or condensation is called, extremely favored in waterworks. This can be a serious problem for sensitive, technical equipment.

Water pipes in the waterworks

How does condensation form in lock chambers, elevated tanks, on pipes and lines?

In order to maintain the hygienic conditions, condensation must be prevented – or at least reduced. A film of water, i.e. condensation water, is always a source of colonization for microorganisms. 

The problem must not only be solved “cosmetically”, but SUSTAINABLY . In order not only to combat symptoms, the cause must be investigated in detail.

The temperature of the water in pumping stations and elevated tanks is usually between 5 and 12 ° C. That means – the lines and pipes are also about the same cold. If moisture-saturated, warmer ambient air meets the cold pipes, this leads to the precipitation of condensation water. 

Condensation water is created by moist air that settles on cooler surfaces, visible in droplets.

Condensation in the waterworks – problems and consequences

Difficulties caused by condensation in waterworks can manifest themselves in a wide variety of ways. The most common problems related to this include:

  • Malfunctions and subsequent failures of the electrical systems
  • Corrosion and moisture damage to the building
  • Increased risk of accidents due to damp and wet operating areas
  • Peeling of protective coatings
  • Impairment of hygiene by algae, microorganisms, mold, fungi and bacteria
  • Damage from rust on machines and pipes
Faucet grate

If important electrical systems are damaged by the condensation, this can lead to malfunctions and in the worst case to failures. That means: expensive and lengthy repairs.

In addition, corrosion damage and signs of wear and tear on technical components increase proportionally with the intensity of the condensation water. The result is increased maintenance costs.

What measures can be taken to save costs and prevent the consequences of condensation water?

Dehumidifiers for water supply systems – effectively preventing condensation in the elevated tank and pumping station

Gate valve

The best weapon against condensation is a dehumidifier with intelligent output control. This results in temperature-adjusted dehumidification. Efficient and energy saving. Can be used from + 2 ° C. In order to prevent the formation of condensation, the humidity must be regulated at a constant level. 

The following applies: The lower the temperature in the room – the more power the dehumidifier must have in order to prevent the formation of condensation.

Condensation dehumidifier or adsorption dryer?

A basic distinction is made between condensation and adsorption dryers. 

Clean water from the waterworks pipeline

For decades, adsorption dryers were the dominant dehumidifiers in waterworks. Why?

Because there were no condensation dryers that would have worked efficiently at low temperatures. With the new technology of the iECO dehumidifiers , however, dehumidifiers are now available that require up to 70% less electricity than adsorption dryers – and can be used efficiently from + 2 ° C. 

In other words, a temperature range that is given as a minimum temperature in every area of ​​the water supply.

Dehumidifiers are available in mobile and stationary versions. For temporary use, mobile dehumidifiers are a good choice because they can be transported and put into operation relatively easily. Stationary dehumidifiers are ideal for long periods of operation in the same room.

The performance of the devices must be matched to the volume of the room in order to achieve optimal results with the lowest possible energy consumption. In addition, air circulation plays a particularly important role in tall, spacious structures . 

Without this, condensation can occasionally form due to the formation of temperature layers and poor airflow, despite a powerful air dehumidifier.
For these areas, combinations of compact air dehumidifiers with “pack-on ventilation modules” have proven to be very effective.

What is the use of a dehumidifier in the water supply facility?

  • Operating costs are reduced
    Regularly removing rust and applying protective coatings takes time and is expensive. Malfunctions and extra-daily maintenance measures are reduced.
  • Less repair work and longer service life of the system
    The constant air humidity and the prevention of condensation reduces wear on machines and devices.
  • Improvement of operational hygiene
    By lowering the air humidity, mold and bacteria are deprived of their breeding ground and operational hygiene is increased.

Facts About Mold! Mold formation and growth factors.

schimmel sofa
Image source:

Mold spores are practically everywhere

Mold spores are tolerated with the air. 

However, they can only grow where there is a suitable breeding ground, such as on damp surfaces.


  1. Mold spores are practically everywhere
  2. Growth factors for mold
Window condens

Mold growth  is therefore always due to moisture and often develops in secret.

The air inside is usually warmer and therefore absorbs more water than the cold outside air.

If this air is not discharged sufficiently and in a suitable manner, it can condense in various places in the house.

These damp spots can be an ideal breeding ground for mold and bacteria.

The reason for an infestation can be the poor state of construction of the building, or simply the presence of people who breathe and exude sweat. Everyone gives off one to three liters of water through their skin within a day.

Cooking, showering or bathing also increases the “moisture production”, just like indoor plants.

Mold often forms when several people live in a confined space.

Hot air can store more moisture than cold air, which is why it is important in winter to heat enough so that the moisture does not settle on the cooled-down outer walls.

Thermal insulation is often poor, especially in old buildings. 

However, this has little effect on rainwater that collects in walls with a damaged external facade. Rain is often the cause of damp walls and mold.

In the case of leaky old windows and newly insulated walls, on the other hand, air is constantly drawn through.

Such apartments, as a rule, avoid mushrooms.

On the other hand, in the event of water damage or a leaky shower tray, moisture can also collect in the masonry, so that the fungal spores find an ideal breeding ground.

Schimmel – Questions and Answers More information …

Growth factors for mold

From a humidity limit of 65% RH, molds settle. 

They also need nutrients and the right temperature, which is optimal for their growth in most residential buildings.

Mold growth along the baseboards

Survival is already assured on surfaces with a pH range of 3 to 9, the value at 5-7 being the most optimal. 

However, it can also happen that the spores settle on surfaces with much higher values, in which case a so-called biofilm of dust deposits has formed.


Schimmel – Questions and Answers from Practice

What causes mold growth in rooms?

Mold can have many causes. The two main focuses are basements and living spaces.

In the basement, condensation moisture in particular is a problem in summer. Ventilation usually exacerbates the situation …

Incorrect ventilation or insufficient ventilation can be the cause in apartments. However, mold formation in apartments is usually the result of two components:
poor ventilation AND thermal bridges (insufficient component insulation).

Mold cause number 1: Too much humidity in the room

Only if excessive moisture is permanently reduced – the mold problem will be eliminated in the long term.

Can I get success with chlorine spray or anti-mold paint?

You have to be aware that you are only doing a “cosmetic correction”.
The cause is not eliminated! You run the risk that the mold preparations used are very often more dangerous to health than the mold itself … Chlorine is emitted into the air and is inhaled … Such contaminated air is particularly harmful to children and allergy sufferers. Such emissions are perceived by dogs / cats for days and weeks … Therefore:

Only removing the cause is the basis for sustainable mold remediation.

  1. Evaluate and equalize the cause of moisture .
  2. Eliminate mold at the “root”! A superficial spraying, or even just an “air disinfection” with spraying of microscopic droplets – is not sustainable renovation!

What are the costs of a comprehensive mold remediation?

The mold remediation costs are divided into the following areas:

  • Evaluation and determination of the appropriate
  • Mold control
  • Reduce humidity if necessary
  • Elimination of mold
  • Accompanying measures such as surface decontamination
  • Airborne germ measurement (if necessary)
  • Wall coating for mold in solid reveals / corners / outer wall (if necessary)

We would be happy to make an offer if you describe your mold problem to us.

Depending on the complexity and extent, a comprehensive mold remediation is possible from EUR 350.00!


“Essential fragrance oils fight viruses” – myth or practical effect?

Vegetable mixtures of many substances, the so-called essential oils, not only smell good and beneficial, but can also have a direct influence on the infectivity of viruses. This is indicated by some studies, the main research interest of which was to investigate the inhibitory effect of vegetable mixtures of many substances on the infectivity of selected virus types.

Especially in the pandemic times of Covid-19, this is an interesting approach that is now being revitalized in scientific discourses.

But what is true about this thesis and what does it mean for our everyday life?
We dare to take a look around …

Yes, essential oils have an effect on viruses

Lemon balm oil, peppermint oil and other extracts have been shown to have an effect on HSV1 plaque formation. Or to put it a little more simply:

Essential oils reduce the infectiousness of the herpes virus .

This anticipates the conclusion of the remarks that now follow. But let’s go a little further to shed light on the importance of essential oils in the context of any new pandemics and diseases that have been known for some time in relation to the risk of infection:

The HSV1 virus is probably one of the most common viruses in today’s modern society – the symptoms are popularly known as herpes . Carson et. Al already showed in 2001: Selected essential oils reduce the infectivity of herpes viruses.

The composition of the oil is decisive: Each substance contributes to the desired effect in a different way based on its own relative proportion or its individual properties. On the basis of these and other studies, Prof. Dr. Jürgen Reichling from the Institute of Pharmacy and Molecular Biotechnology in Heidelberg in 2010 as part of the Swiss Phytotherapy Conference in Baden: Viruses that were treated with a non-cytotoxic, i.e. non-cell-damaging concentration of essential oils before the host cell was infected, were no longer there as infectious as untreated viruses. A breakthrough that seemed promising even then!

However, the herpes virus is one that is mainly transmitted via smear infections through, for example, contaminated glasses. 

However, these findings are always reason enough for a hypothesis that could be that essential oils can also prevent or at least minimize the risk of infection with the Sars-CoV-2 virus .

Essential oils: bioaerosol transmission demonstrably stopped!

Viruses under the microscope

According to the findings of Carlson et al. (2001) Ehrhardt et al. in 2007 the effect of essential oils on the infectivity of influenza viruses under the microscope. The influenza virus is a type of virus that – like the corona virus, if applicable – can spread through bioaerosols and thus through the air.

In an in vitro study by the above-mentioned scientists with extract containing polyphenols (rockrose extract) it was shown that the viral infectivity of avian and human influenza viruses (H5N1, H7N7 and H1N1) is 90 to 100 percent – almost completely –  eliminated can . But what about the risk of infection? An in vivo experiment, i.e. an experiment on living organisms, was then carried out for this purpose.

In a second study by Droebner et al. (2007), in which Erhardt also participated, mice were exposed to avian influenza viruses. While a control group of mice came into contact with the viruses in the form of water aerosols, other mice received the same dose of virus via a CYSTUS052 extract (cistus extract), also in microfine aerosol form .

The result is astonishing: 53 percent of the animals that received the virus through water aerosols died. In the group of animals exposed to aerosols enriched with essential oils , only two animals developed symptoms of the disease.

Exciting: The oral administration of the oil extract had no effect. But now to believe that only rockrose extract has this apparent miracle effect on virus infectivity is rash: Prof. Reichling expressly points out (25th Swiss Conference for Phytotherapy, Baden) that this effect has already been carried out in similar studies with other essential oils (phenol-containing Plant extracts) could be detected.

Essential oil enrichment in the air –
a promising approach in combating viruses

Antibacterial fragrance oils

The studies from 2001 and 2007 already showed: an antiviral effect of essential oils is obvious and is undisputed. Ultimately, it remains to be seen whether the findings presented here can also be adopted for the transmission of the new type of corona virus .

Nevertheless: A similar effect can be assumed, if not very likely, given the current status of the corona virus being transmitted in almost the same way as the influenza viruses, which are dangerous to humans.

What do we learn from it? Anyone who is already using the benefits of essential oils is not doing anything wrong! That the result is a health-promoting and infection-inhibiting effect for humans is a hypothesis that has not yet been officially confirmed, but is nevertheless likely, which enables new options for action in infection prevention! 


HIGH QUALITY essential oils (counterfeits from industrial production, which are manufactured with cheap odor substitutes, are to be viewed critically with regard to the mode of action) can be used as a supplement to the 2 most important preventive measures against viruses:

ELFI 150

1. Reduce the activity / aggressiveness of viruses through optimal room humidity:

The selection of suitable air optimization systems requires a needs analysis.
There are hundreds of models of humidifiers – but only a few work without negative side effects.
Most produce visible water vapor aerosols, and aerosols are suspected of providing a convenient means of transport for viruses.

2. Circulating air filtration of the room air to eliminate aerosols and viruses. Mobile devices with at least the HEPA13 standard and CADR certification have proven themselves – e. B. the “Air Protector” series.

3. Optional use of essential oils – ideally as a direct addition to humidifiers or as a scent pad attachment on circulating air filtration systems.


Air purification process HEPA and UV-C

  • Author: Eduard Paschinger
  • Date: May 19, 2020
  • UPDATED ON: October 12, 2020

New air purifier technology against viruses in the office?

Woman without a mask in the office

As part of preventive health protection and the associated new challenges due to the ongoing Covid-19 pandemic, employers and building managers are concerned about a virus-free air and work environment in offices, business and work rooms.

A new generation of air filtration systems promises great things: The combination of tried and tested, antiviral filter technology meets new research findings on the antiviral effect of UV-C light and is thus intended to be a revolutionary and previously unseen option for antiviral air purification and air hygiene Offer.

The problem:   the costs . The new generation of air filter systems, equipped with a combination of UV-C radiation technology and a tried and tested antiviral filter system, which declare war on virus DNA and other air pollutants, should remain affordable and at the same time ensure   effectiveness against Covid-19 and other corona and influenza viruses . 

HEPA15 / ULPA: antiviral air filtration with potential for improvement?

It is used in clean laboratories and even in operating theaters , which require an absolutely virus and germ-free environment at all times. We are talking about the so-called HEPA15 or ULPA filter technology , which not only filters viruses, but also other air pollutants from allergy-causing pollen to fine and coarse dust from the air environment.

Even if this filter system against pandemic pathogens such as the new Sars-CoV-2 virus raises high hopes, it has a disadvantage that reduces the effectiveness of the well-intentioned approach in everyday office and business life and is not able to sufficiently contain the risk of infection:

The functional principle of the virus filter is based on the finest filter hairs that remove potential virus particles from the air and dry them out. So a “passive” air filtration. 

UV-C light: antiviral effect with great potential

UV-C light

Almost everyone has felt the cell-damaging effects of UV light on their own body in the truest sense of the word: a few hours too long on the beach and the dreaded sunburn shows up in the evening. Due to the cell-damaging effect of short-wave light, the risk of skin cancer increases with every skin burn.

It is precisely this cell-damaging effect that is supposed to benefit the fight against viruses : Walker et al. (2007) present study-based results that indicated the effectiveness of UV light against already known coronaviruses a few years ago and today offer the basis for a new, even more efficient approach in corona prevention.

Since the novel Covid-19 virus is also an enveloped virus that has similar properties to coronaviruses that have been known for a long time, there is much to suggest that UV-C light also renders the Sars-CoV-2 virus harmless . The idea of ​​combating viruses with the help of UV light is by no means new: UV-C light was used in France as early as 1908 to disinfect municipal drinking water. It is still used today for disinfection in kitchens and hospitals. The short-wave light penetrates the cells that absorb it. DNA is considered to be particularly susceptible to ultraviolet light.

Walker et al (2007) demonstrated that even a very low dose of only 254 nm leads to damage to the viral genetic makeup of coronaviruses in aerosols and thus renders the virus harmless to its environment.

It can be said that UV-C air purification could represent a promising approach for the prevention of respiratory, virally-induced respiratory diseases. Whereby the Federal Environment Agency stated in an announcement from August / September 2020 that no UVC air purifier has yet submitted a sufficient study to the Federal Environment Agency …

With UV-C radiation against viruses- What is important?

If an air cleaning system that works on the basis of UV-C radiation is used for air cleaning, the shielding of the radiation source is essential for health protection. Based on the results of Slonim et al, which date back to 1969, from today’s perspective it is advisable to use certified, specially coated devices . The special coating not only prevents potential high-energy UV radiation from escaping, but also prevents oxygen from breaking down into two atoms as part of the photolysis process due to the high-energy UV radiation and the latter reacting with other oxygen atoms to form ozone .

If we discuss the effectiveness of antiviral air purification using UV-C light, which is also used in offices and workrooms as a comprehensive preventive measure against the coronavirus Covid-19, weak points and potential factors that reduce the effectiveness of this approach must of course also be discussed can be carefully and – where possible – switched off. There is no question that the following aspects are decisive for the effect of the high-energy radiation on the virus DNA and can determine the success and benefits of the air purification measure:

  • Possible inhibition of the radiation effectiveness by a cooling air flow
  • Probability of direct exposure to UV-C light on potential virus particles
  • Level and duration of the radiation exposure

In particular, the strength and duration of the radiation exposure to possible, active virus DNA, with the aim of rendering it harmless, seems to be of particular importance in the context of an effectiveness assessment. Every Mallorca vacationer knows too well: 5 minutes of direct sunlight does not make you sunburn.

The same is likely to apply to the effectiveness of UV-C light on viruses: the shorter and shorter the exposure time or the dose of UV-C light to the virus, the higher the risk that the virus will DNA remains active and therefore infectious for humans .

Fight viruses with compound systems?

Our claim is no less than the greatest possible effectiveness of virus control through modern air purification that is harmless to humans .

Keeping office and business premises free of viruses and ensuring health protection for employers and employees in the long term with the highest efficiency requires recourse to tried and tested antiviral air purification processes and the elimination of possible weak points that are inherent in the air purification processes that are already available .

So it is obvious to fall back on the advantages of the proven, filter-based air cleaning and to integrate an ACTIVE disinfection system. In the ION-HEPA process, the potential weak points of conventional filter techniques are compensated for by integrating a special surface coating and electrostatic charging. This takes place in such a way that the advantages of both processes increase the efficiency of the air purification, on the one hand alternately compensating for potential weak points of the other technology and on the other hand the virus-damaging mechanism of action of the other approachamplify .

Highest efficiency thanks to combined filter technology

Luftprotector is a highly effective cleaning system based on two proven technologies: The filter system guides the air flow through the HEPA filter. Viruses and virus particles that are in the aerosols in the room air are filtered out of the room air by the fine filter hairs . Instead of simply relying on the passive process of drying out the virus DNA, the efficiency of the ionized coating comes  into play: The particles are retained in the filter material like in a magnet and their shell is exposed to the instability process. The new innovative air cleaning systems can be adapted to the local and individual demands and needs of the respective business and office space.

This is what modern air purification devices do

The highly effective air cleaning systems , manufactured in the EU, work extremely quietly thanks to their low voltage fan control and, with their 12 V technology, are very energy-efficient for maximum operational safety . High-quality material and durable built-in parts also reduce the need for maintenance and guarantee the customer the purchase of a sustainable , ecological product

Criteria when making a decision for the right air cleaner model are the individual conditions of the rooms: In addition to the size of the room / office and the volume of air to be cleaned, a decisive question is whether a supply and exhaust air conditioning system is used.

The available model variants are suitable for use in office and living spaces from 2 to 160 square meters 


Office – air quality versus health

Health protection in offices and meeting rooms:
Customers and employees welcome professional air purification


After the Covid reopening, companies will be subjected to high additional workloads: extensive disinfection of surfaces, intensive cleaning, increased security measures. 

But what about health in the office? 

Where are dangers lurking and how can those responsible respond to them preventively ? Are the hygiene requirements sufficient? Do customers and employees feel good, or isn’t there a latent fear of infection after all?

Virus-free, healthy air:
This is the air quality in offices

People in the office

Indoor air quality is a health issue that is gaining in importance: the average worker spends  70 to 90 percent of his time indoors. Offices are frequented every day by many employees and sometimes also by visitors. Each and every one of them leaves innumerable invisible traces: 

A single sneeze and cough releases up to 40,000 microfine suspended particles, the so-called bioaerosols. Contrary to popular belief, these ultrafine particles do not sink to the ground, but stay in the air for up to 5 hours . In the worst case, thousands of potentially infectious viruses that represent a health risk for employees and customers can cross the room with them .

Office – air quality versus health

The latest findings provide indications that the indoor air could represent the decisive problem in the risk assessment of a viral infection .
So far, all studies on the infection with Covid-19 have come to the result that not a single surface spread of the virus could be detected!  
But how does a virus spread if surface transmission is apparently not the “number 1 risk of spreading”? 

A cluster case in the USA has steered science in a new direction when it comes to risk assessment – the momentous finding revealed: The virus is not only transmitted by droplet infection – but also via aerosols !

Do the extensive and costly disinfection measures possibly not have the preventive effect that has been assumed for a long time? Do you have to rethink and look for the cause in the airborne particle transmission? Are antiviral air purification systems the solution to minimize the risk of infection?

Virus-free, healthy air: this is how it is about air quality in offices

Indoor air quality is a health issue that is gaining in importance: the average worker spends  70 to 90 percent of his time indoors. Offices are frequented every day by many employees and sometimes also by visitors. Each and every one of them leaves innumerable invisible traces: 

Sick man in the office

A single sneeze and cough releases up to 40,000 microfine suspended particles, the so-called bioaerosols. Contrary to popular belief, these ultrafine particles do not sink to the ground, but stay in the air for up to 5 hours . In the worst case, thousands of potentially infectious viruses that represent a health risk for employees and customers can cross the room with them .

Aerosols: invisible risk of infection in the office?

Spray aerosol

The opinions and research results contradict each other strongly. Reliable statements and recommendations that provide a solid basis for further decisions and measures in the context of occupational and customer protection are important for office managers and employees .

Even without undertaking an extensive scientific excursion, the latest studies and findings can already be summarized as follows with certainty: A transmission of corona and influenza viruses through the air alone cannot be scientifically ruled out, but it can be excluded by low- investment measures demonstrably minimize !

The basic problem: Aerosols, enriched with potential viruses, remain in the air and are carried into the back corners of the office by the thermal air currents that are everywhere.

Even if you adhere to the known hygiene regulations, the cough and sneeze labels and the prescribed minimum distances without hesitation, you can not categorically rule out the risk of infection .

However, there are measures with which the air quality in work rooms can be improved sustainably in the interests of health protection with little effort. The first office operators have already reacted. Customers and employees welcome the measures and would like a nationwide implementation for all offices.

Professional air cleaning for a healthy working environment in the office

The pollution of the indoor air by bioaerosols increases with every person in the room. For example, if there are 10 people in a room, the amount of bioaerosols released increases tenfold. The hygiene and safety specialists are alarmed: Hundreds of people come and go every day in small and medium-sized office buildings .

Experts advise: In order to improve the air quality sustainably and permanently in terms of health protection, it is essential to ensure proper air hygiene .
It is not enough “to use ventilation systems only to ensure a circulation of the room air, which can distribute the aerosol particles even further and more strongly in the room”, says the head of a study on the health improvement of the indoor air quality in closed rooms.

An essential pillar for combating viruses and germs in aerosols is the creation of an environment that is hostile to viruses. Viruses have a hard time if the relative humidity is optimal . Studies show that the risk of infection with dangerous viruses – including the Covid 19 virus – is significantly reduced in an environment with a humidity of 40 to 60 percent : The storage of proteins and salts from the surrounding air prevents the virus particles from being suspended .

In addition, experts recommend
using certified filter systems: LOW-DENSE virus filters clean the surrounding air from the smallest suspended particles in a highly effective, continuous and sustainable manner.

Low investment for maximum protection:
First employers react and give their employees and customers security

Evidence is growing: Official requirements, which include equipping business premises with professional, antiviral air cleaning systems, could only be a matter of time .

Experts are even considering:

People under the umbrella

The rush for CADR-certified and professional air purifiers in everyday work could reduce demand for a long time and cause prices to rise .

Those who are already investing in the health of their employees and, last but not least, in the health of their customers are well advised: the first employers are already setting an example with the positioning of air protector systems and making it clear that the health protection of their employees is paramount Place. Covid-19 shows every employer that the health of employees has   top priority!

Man with cross

Selective surveys reinforce the efforts: Employees who bear a higher risk or who are sensitized to the topic particularly welcome the measures. This investment in health brings the company a lasting bond of trust and motivation that will have an effect – beyond the times of Covid-19

The investment costs for professional antiviral filter modules that meet the CADR test standards are between EUR 400.00 and 1,200.00. Structural measures are not required. The maintenance costs are limited to a regular filter replacement.

It is an investment that bears fruit in two respects: Apart from the positive effect of healthy air on employee motivation, optimal air hygiene can reduce employee absenteeism due to illness – and thus save high costs!
Because one thing is medically undisputed: In addition to viruses and germs, a large number of other microbes, allergens and geogenic air particles pollute the human immune system – especially in closed rooms.


Building drying moisture in new buildings

What is meant by building drying?

The drying of a building is called building drying. This includes drying out the moisture created in the construction process as well as drying out water that has subsequently penetrated. 

Excessive building moisture can have many different causes. There are even more reasons for water to penetrate. The main part of this article will deal with the development and remediation of excessive building moisture . For information, reasons for subsequent water penetration are briefly mentioned in the next chapter. 

This should also serve as an aid in determining what is the reason for the excess moisture. Various methods are available for drying building moisture, which can vary depending on the intensity of different factors (for example: temperature, humidity, season, weather, wind, surface and water content ). 

These range from simple and extensive ventilation to building drying by experts. Sea level and relative humidity also play an important role.

Common causes of water ingress

In addition to the “real” building moisture, there are a number of other reasons for how water can get into a building. These include:

  • Structural damage such as cracks, burst pipes and broken pipes
  • Transport of capillary moisture
  • Penetration of water through precipitation in the case of roof damage
  • Penetration of rain due to a missing roof in the shell
  • Floods
  • Diffusion of humidity in the building
  • Formation of condensation moisture on cold walls in the basement
  • Adhesive wall moisture
  • Hygroscopic humidity

Effective drying in new buildings

House with plans

Nowadays construction processes are very fast compared to the past thanks to advanced technology. It only takes a few weeks from the foundation to the finished house or block of flats. There are various ways of drying a new building or building shell. All have their place. 

However, they differ in terms of their range of applications and their effectiveness. For many building materials, such as cement, screed, etc., water is the starting point. This is important for the correct consistency of the mixed mass for processing. Then it must be ensured that the excess moisture escapes again in order to form a stable material from the viscous mass.

Important information about moisture in the building shell

House in the raw state

The residual moisture from the building materials must dry completely in order not to cause any damage. This is not so easy. Brick masonry, for example, takes between 100 to 350 days to completely dry out without any aid. 

In the case of concrete, this time increases considerably. A total of 450 to 790 days are needed for it to dry out completely. This is why extensive and thorough drying by experts is so important. 

To make this easy to accomplish, forward-looking coordination with the other structural and technical measures is highly recommended. In this way you can be sure that no deadlines collide and that the construction project runs smoothly according to plan.

Drying time of excessive residual moisture in new buildings

The time it takes to dry a new building depends on various variables. The most important are the following:

  • Thickness of the screed
  • Degree of moisture penetration of the building material
  • Room temperature
  • Desired degree of drying

As a rule, with a suitable number of drying devices, a drying time of 2 to 5 weeks can be assumed. If less than this time is estimated for the new building drying, only the top layer of the processed building material dries. 

Parts of the masonry that are located further inside still contain residual moisture and can, under certain circumstances, develop a major damaging effect. Therefore the adequate drying time is extremely important. It is worth consulting experts to determine the best drying option.

Formation of moisture in new buildings

Shell foundation

Most of the moisture is hidden in the various building materials. The masonry and concrete in particular can store a great deal of water. If these are not properly and professionally dried before the building is completed, considerable damage can occur later in the construction process. 

As a result, extensive repairs are necessary. It is therefore worth planning the drying process right at the beginning or, preferably, before the start of the new building. That costs a little money, but ultimately saves time, nerves and damage to the building. 

After half a year, the water in a concrete slab is still about 6% of the weight. This residual moisture can then escape from the concrete and penetrate into adjacent rooms. If there are no vapor barriers in place, insulation materials can be enriched with moisture. 

The value of the insulation deteriorates considerably. In addition, ideal conditions for harmful molds are created. Professional building drying is therefore extremely advisable and urgently recommended for many reasons!

Building drying in new buildings – an overview

Due to the many different materials that are used in house construction, building drying is a complex subject. This makes reliable and good advice all the more important. Depending on the construction and the raw material, different drying techniques are used. The drying of the building in new buildings is best done before laying floors and before painting. Then the surfaces of screeds, ceilings and walls can also be dried with great effectiveness.

The solid house – information on building drying

In the shell of a solid house, the level of residual moisture is particularly high, especially higher than in the prefabricated construction. The main causes of excessive moisture are the screed and the interior plaster. Therefore, with solid construction, professional building drying should be started as soon as possible after completion. The following are very susceptible to increased moisture:

  • Difficult to reach, winding corners (for example around the chimney)
  • Place the transition to dry plaster
  • Poorly ventilated area (e.g. stairs)

In these places, the professional drying with professional devices in the new solid house is particularly efficient. They promote a good indoor climate and preserve the quality of the house.

The prefabricated house – information on building drying

Prefabricated house

Compared to the solid construction, the prefabricated house construction has a great advantage. There is simply less residual moisture build-up. Drying the building is still recommended. The residual moisture in the prefabricated house is mainly caused by the screed, which is used for the construction of the floor. 

In addition, the insulation in the basement can increase the humidity. Building drying by experts prevents these problems and prevents the formation of mold.

Different types of drying in new buildings / shell construction

Basically, modern and traditional ways of drying buildings can be distinguished. In the following, the different types of building drying are discussed in more detail in order to shed more light on the advantages and disadvantages. This should help to decide on the right type of drying, adapted to the construction and the materials used.

Building drying earlier – a cost-effective alternative

When machines were not yet available, structures were dried naturally. In this drying process, moisture is removed from the rooms by moving air. This can be implemented relatively easily in practice.

 All you have to do is ensure a constant flow of air. This is done , for example, through cross ventilation . Depending on the climatic conditions, this process takes different lengths of time. The greatest advantage of traditional building drying is certainly its low cost, although it is not particularly effective. 

When using this method for drying new buildings, it is particularly difficult to coordinate appointments for the work that has to be done, because the drying time is very difficult to estimate.

Building drying today – drying effectively and economically

Nowadays, modern, technical devices can be used to dry highly effectively and quickly. Drying buildings and rooms in new buildings is child’s play. With air dehumidification using powerful devices, a humidity level of 25% to 45% can be achieved. In addition, the drying takes place evenly distributed throughout the room. 

So it doesn’t matter where the moisture has accumulated. This means that drying can be carried out continuously and homogeneously, regardless of the weather. Modern technology therefore helps new and unfinished buildings to dry out quickly and economically. The construction work can then continue on time. This saves time and money.

In summary, there are some advantages of dehumidifying with professional drying devices:

  • Effective drying through powerful devices
  • Even and faster drying process
  • Economical and cost-saving
  • Enables tight schedules to be adhered to when building new buildings

Techniques for drying in new buildings

Modern building drying uses different techniques to achieve a perfect result. The most important ones are listed and briefly described below. Depending on the area of ​​application, building material and degree of moisture penetration, they differ accordingly.

Drying of cavities

If the interior of the new building is affected by moisture, cavity drying is used. With it, the humidity is extracted from these areas with pinpoint accuracy. So it is a purposeful removal of residual moisture. This type of drying is particularly important when cavities have been suffering from residual moisture for a long time.

Room drying

Special drying devices enable damp masonry to be dried. Special high-performance units are used for this. This system is particularly suitable for generating warm air for drying.

Screed drying

The drying of screed is a particular challenge because it stores a lot of water and thus moisture. This problem is solved by negative pressure. This makes it possible to properly dry the most varied types of screed. 

Precise and professional drying is extremely important for screed in order to prevent expansion. This protects the important insulation materials in the substructure. If special insulation had to be removed because of excessive moisture, it would be extremely costly.

Infrared drying

Infrared drying is a special process that uses large heating plates to remove excessive moisture. The energy-charged infrared radiation is used to generate heat. This is also ideal for mold infestation on walls.

Microwave drying

This technology is mainly used for drying small, limited areas. Electricity is used to seal leaky surfaces. The water molecules in the materials are influenced accordingly by microwaves . The resulting heat, caused by friction, caused the deepest layers to dry out.

Proper drying in new buildings and in the shell

Correct drying of screed and plaster in new buildings is particularly challenging. If it is done incorrectly, cracks or even flaking can occur. Usually, the new building does not begin to dry until the plaster has been applied. Special condensation dryers are used for this. The different types of plaster and screed must be taken into account, as they each require special handling:

  • Screeds with calcium sulphate can be dried the following day
  • If cement is used for the screed, it is essential to wait 6 to 11 days before starting the drying process.
  • For cement and gypsum plaster, there is a waiting period of 1 to 3 days before drying begins

Master’s tip: It is extremely important to maintain a closed system during the drying process. That means: All windows and doors that lead outside must remain closed. In contrast, inside the new building, every door should remain open. This is how you achieve the best possible drying effect!

Electric dryers versus oil and gas dryers

Drying devices operated with oil and gas are not suitable for use in new buildings. This is due to the fact that there is excessive water vapor formation. For every liter of drive fluid, around one and a half liters of steam are released into the ambient air.

This excess moisture can then settle on ceilings and walls. Exactly the opposite effect is achieved: the new building becomes damp instead of drier.

Electric dryers are therefore ideal for drying new buildings. They are safe and efficient. In addition, no oxygen is burned when heated, which ensures quiet and odorless operation.

Ventilation and dry heating in the new building

Ventilation and dry heating are also not promising alternatives. Both procedures are costly, slow, and high risk. Correct ventilation is more complicated than it sounds. 

The humidity in the outdoor area must be observed very closely and the duration of the ventilation processes should also be precisely determined. Dry heating of new and unfinished buildings can take up to 2.5 years. The energy costs increase enormously with this technology.

Therefore: Trust your specialist on the subject of drying new buildings. Save time, energy and nerves!

Moisture in a new building? No thank you! – The list

  • Already in the course of the construction process, ensure that the damp building materials are adequately dried before further construction
  • In the case of organic materials, care must be taken to ensure that they are properly dried, as these are ideal breeding grounds for mold
  • When finishing the interior, choose the right building materials
  • Prevent moisture penetration and cover the roofs
  • Ensure that no water can get into the shell through walls or cellars
  • Prevent condensation from forming!

And the most important thing at the end!

Make sure that the new building is completely dry before moving in. In this regard, walls inside which are plastered on both sides should be particularly checked. If in doubt, please contact your specialist! This saves you time, nerves and money.


Save electricity when drying laundry

Dry laundry in an environmentally friendly and natural way –
air drying saves electricity

Fresh laundry

The original way of drying clothes is hanging in the fresh air. Items of laundry flutter loosely in the wind on a clothesline, releasing their moisture into the environment and thus contributing to a good climate. Ideally, the bright sun ensures sterility. Air and warmth give the textiles a uniquely fresh scent and no electricity is used. This form of laundry cleaning is still recommended in many energy-saving tips to this day.

Unfortunately, this idyll is not always feasible . It assumes that a garden, terrace or balcony is available to dry the laundry and requires dry weather. In an apartment building in the city, it is therefore often not possible to dry laundry in an energy-saving way.

Is the electric dryer an alternative?

Many people resort to an electric tumble dryer because they see no way of drying their laundry without electricity. This applies in particular to families with children and correspondingly large quantities of laundry. 

At first glance, the electric tumbler also makes laundry care easier because it saves time for hanging and removing textiles. The good ventilation when drying in the device also simplifies ironing. But using an electrical device also has many disadvantages .

Electric dryers use electricity and are expensive

Housewife operates clothes dryer

Did you know that electric drying devices are one of the largest consumers of electricity in the home ? Electric laundry drying also has a negative effect due to the following aspects:

  • High acquisition costs
  • Increase in electricity costs due to the additional electricity consumption
  • Some textiles shrink
  • Maintenance effort and repair costs
  • Noise development in the company
  • heavy wear and tear on clothing

In addition, not all textiles are suitable for electric dryers. It is therefore always necessary to hang up individual items of laundry on the line or the clothes horse.

What happens to textiles in the dryer?

Woman checks washing recommendation

Textiles lose moisture comparatively quickly in the tumbler. A drying program lasts between two and four hours, depending on the setting selected. To achieve these short drying times, high temperatures are necessary. However, these put a strain on clothing and other textiles.

Some synthetic materials can be completely destroyed in the process. High-quality materials such as silk , wool or linen would matt or shrink in the dryer at the high temperatures. Synthetic and mixed fibers can stick together and holes can appear.

Some materials even run the risk of catching fire . This applies in particular to padded components such as shoulder pads or bra cups. Printing foils can melt and lace fabrics can be destroyed. 

Rhinestones, sequins and appliqués also suffer from the temperatures in the dryer. The adhesive may also come off. This reduces the selection of items of clothing and laundry that are actually suitable for electric dryers.

Electrical drying devices are rarely necessary

Taking into account the criteria mentioned, it only makes sense to purchase a dryer if there is no other possibility of drying. In a small apartment in the city center with a correspondingly small bathroom, a tumbler or a washing machine with an integrated dryer are often the only options. 

In addition, in many residential buildings there is no drying floor or laundry room. Since many items of clothing are not suitable for the electric dryer, a clothes line, a rotary clothes dryer or some other drying facility is always necessary. 

As a result, the capacity of the electric dryer is often not used and additional unnecessary electricity costs arise. Due to these criteria, the purchase of an electric rotator is not worthwhile in most cases.

Save energy – dry laundry without electricity

Air drying saves electricity. The hanging of the laundry in the fresh air always depends on the weather. It is impossible when it rains and it can be lengthy in winter. However, it is also possible to save energy when drying in frost and dry weather.

Saving energy in winter: air drying through sublimation

Physics describes the phase transition of a substance into another physical state as sublimation. In the case of water, it is about the transition from a solid, frozen to a gaseous state. This process is also known as freeze drying. This can also be used when drying clothes. 

Laundry in winter

Wet fabrics first freeze on the line in frosty conditions. If the laundry is frozen, the state changes from ice to steam without the laundry getting wet again. The wind simply blows the water vapor away from the laundry. Garments become pleasantly soft and have a fresh scent, all without consuming electricity.

Save electricity when drying laundry in the apartment

If an opportunity to dry clothes outdoors is not available, the indoor drying rack can be an alternative. If the bathroom is big enough, it will find its place there. A guest room or separate dressing room are also good places to set up the drying rack so that it does not interfere.

Clothes horse in the room

Alternatives to the drying rack:

Space-saving alternatives to the conventional wing drying rack are foldable clotheslines that can be stretched above the bathtub, for example. This also has the advantage that water can drip into the tub. If the clotheslines are not needed, the system simply pulls them in with the help of a tension spring and they are discreetly hidden in a small box on the wall. Some drying racks are designed vertically so that the laundry is hung on top of one another and the rack takes up little space.

And what about the moisture in the room?

Mold growth along the baseboards

Drying laundry in the apartment is unpopular with many landlords. Since the moisture escaping from the laundry cannot completely escape, there is a risk of mold forming in the home. To reduce this, the room temperature would have to be increased and at the same time well ventilated. However, this contradicts the goal of saving energy and consequently increases heating costs .

Mold can also form in poorly ventilated dry cellars and attics. This risk is particularly high when the drying rooms in apartment buildings are heavily used. Just the open window or ventilation in the drying room are not enough to prevent moisture damage and mold. Rather, they can additionally increase the humidity of the room air when it rains and when the air humidity outside is high.

Drying clothes in damp rooms also leads to long drying times . The consequences can be the formation of unpleasant smells in the textiles and the formation of mold spores in the fibers.

Moisture can also develop in the home when using an electric dryer. Only models with exhaust air technology completely dissipate the moisture to the outside. In apartments, however, condenser dryers are mainly used because there is usually no device to divert the water vapor to the outside.

The solution: drying clothes in a good indoor climate


If you want to dry laundry in the house without the risk of mold forming in an energy-saving manner, the use of a high-quality air dehumidifier – so-called regenerative dryer – is the ideal solution. The dehumidifier removes moisture from the room air, ensures a healthy indoor climate, shortens drying times and saves energy.

How does the dehumidifier reduce humidity?

Because the dehumidifier removes moisture from the room air, it prevents the formation of mold and other moisture damage in the dry cellar, in the attic or in the apartment. The water produced during the condensation drying process collects in a container and can therefore be easily removed. By a further use for watering flowers or cleaning the house , the water undergoes a practical and resource-saving re-use.


High-quality regenerative dryers produce not only the ideal room climate, but also clean air. The modern devices use special particle filters to remove dust, pollen, mold spores and other particles from the room air . A regenerative dryer therefore offers various advantages at the same time:

  • Reduction of humidity in the room air
  • Purification of the indoor air
  • Protection of laundry from unwanted buildup
  • positive effects for allergy sufferers
  • Save electricity costs

Of course, regenerative dryers also need electricity. Nevertheless, you can save a lot of energy with this drying method compared to standard tumble dryer devices . The connected load of a typical tumble dryer is between 0.8 and 2 kW! A regenerative dryer, on the other hand, only needs 0.3 to 0.4 kW per hour – and also keeps the room mold-free !

Drying textiles properly – saving energy

All in all, if you want to save energy when drying clothes, you should heed the following tips:

  • Textile fabric dries with air and sun on the rotary clothes dryer
  • First spin items of laundry thoroughly in washing machines
  • Carefully dry sensitive textiles in the spin dryer
  • Laundry dries slowly and poorly in damp room air
  • Regenerative dryers create an optimal room climate and help save electricity

If you want to save on drying your laundry and take responsibility for the environment, you can hang textiles on the line, a stand or the rotary clothes dryer. To avoid the consequences of high humidity in drying rooms, the use of a regenerative dryer is ideal. This saves you a lot of energy when drying compared to using a conventional tumble dryer. 


Infection risk gym

Aerosol-borne virus transmission during exercise


“Breathing under physical exertion releases more aerosols – and thus potential virus particles” – warn sports physicians.
Fitness studio operators have long since accepted their responsibility and use ventilation systems to “vent” aerosols.

In the cooler months, however, it becomes more and more difficult to ventilate – because it is hardly possible to ensure that the incoming fresh air is heated up quickly.
That is why indoor air experts recommend the installation of air purification devices.

Sport favors aerosol emissions

Woman breathes
People run through the forest in winter

Physicist Bert Blocken from the University of Eindhoven published a study in which he showed that a cloud of the finest bioaerosols can spread up to 10 meters behind a runner . A minimum distance of 2 meters is not enough here. When cycling (Velo-Sport) the recommended minimum distance is even 20 meters .

Perikles Simon, a renowned sports scientist at the University of Johannes Guttenberg University in Mainz, also points out that humidity is a decisive factor in the transmission of viruses through the air. “[…] depending on the weather , a virus like smoke spreads in the air,” explains the doctor and advises athletes to use sunny weather instead of planning the daily lap in fog and haze. 

The background behind this professional advice: Enveloped viruses, and thus also influenza and Sars-CoV-2 viruses, like it humid: If the humidity rises above the critical value of 60 percent , viruses have an easy time of it. But what does all of this have to do with exercise in the gym ?

Fitness studios ensure healthy air

If sport – like in the fitness studio – is done in closed rooms, the aerosol load in the room air increases by leaps and bounds. People exercising on the machines can do sports on the spot in the studios. If the court or the exercise equipment now re-occupied, the following athletes breathe in the worst case in the very same aerosol cloud that his predecessor in front of him left has. 

Disinfecting and cleaning the devices and grip points is also not a sufficient measure to master the risk of infection via bioaerosols. Studies show: Without measures, the finest droplets can be detected in the room air for up to 5 hours .

Regular ventilation plans should further minimize the risk in the warm summer months. In autumn and winter, however, experience has shown that the windows remain closed for most of the day: 

Many operators of sports facilities react preventively in order to give sports-loving customers a feeling of security during training and to prevent infections based on the latest findings.

Air hygiene in sport is the be-all and end-all

Areas and industries in which many people are in confined spaces in closed rooms are concerned about air hygiene and take measures to prevent the spread of viruses or to keep them as low as possible. Airlines show in an unprecedented way that high-quality air hygiene is also possible in closed rooms in which many people are staying at the same time : 

Advanced ventilation technology ensures that all of the cabin air in the aircraft can be completely exchanged in just three minutes. In addition, HEPA filters are used to filter out virus particles from the portion of the filtered air. 

What is possible above the clouds also works on the ground:
Air purification systems with ION HEPA filters ensure that the ambient air is free of germs and viruses. Virus transmission is  inhibited , while viral genetic material is rendered harmless in an active, destructive process  .

Suitable air purifier models for fitness studios: 
high-frequency systems and air purifiers from the GRAN 900 model series .


FAQ: humidifiers

Does a humidifier make sense? Which humidification methods are suitable for your own individual needs and requirements and what can a humidifier actually do? These questions are probably at the top of the list for all those who deal with the topic of air humidification. Reason enough to take a closer look at the most frequently asked important questions …

Does a humidifier make sense?

Woman at the PC with glasses hand

Many of those affected are familiar with the problem in the cold months of the year, when there is strong heating: if the room air is too dry, it irritates the eyes and respiratory tract and can even lead to chronic headaches.

The solution is a humidifier that keeps the relative humidity in the room at a constant optimum . If you are thinking about buying a humidifier, you should consider a few points and be aware of the fact that air humidification does not automatically mean air purification.

If the air humidity is also in an optimal reference range, which counteracts the above-mentioned complaints and symptoms, other dangers come to the fore at the same time , which threaten as potential risks in the event of improper use and insufficiently hygienic cleaning.

Air humidification: yes, but correctly and with a sense of proportion

For people who suffer from irritated mucous membranes or who even complain of headaches due to insufficient humidity, a professional air humidifier is an acquisition that is worthwhile and counteracts the symptoms quickly and effectively .

However, if the humidity is too high, mold growth can result. Therefore, it is important to have the right setting for a comfortable and healthy feel-good climate with optimal humidity. The relative humidity in living spaces should be between 40 and 60 percent , but never below 35 percent and above 65 percent. 

With a hygrometer, the humidity in rooms can be measured reliably with just one movement. A preliminary test helps you decide whether you should consider purchasing a humidification system.

Analog hygrometer and thermometer

In some rooms, the use of an air humidification system can be particularly recommended: This applies, for example, to rooms in buildings where the fabric of the building consists to a large extent of building materials with high sorption properties . Some building materials such as chipboard, wood or plaster of paris absorb the air humidity to a greater extent than conventional masonry.

What is a humidifier good for?

A humidifier regulates the relative humidity in closed living and working spaces. In this way, an air humidification system can help to alleviate or prevent typical symptoms and complaints that are directly attributable to excessively dry air .

A correct and needs-based setting of the humidifier is important: If the humidity is too high, not only mold has an easy time. The risk of germs, viruses and bacteria being transmitted also increases.

Which humidifiers are the best?

Humidifiers come in all shapes and colors. This is due to the fact that the various humidification processes are based on different technologies . A distinction is made between passive and active air humidification: All processes aim to regulate the air humidity, whereby there is no risk of overhumidification with passive humidification processes.

Before deciding on one of the technologies mentioned above, personal needs and requirements should be weighed and taken into account. The decision can be influenced by the following aspects:

  • Volume of the device
  • Energy costs
  • Hygiene and maintenance needs
  • Water hardness
  • Risk of potential overhumidification of the room air

Where should a humidifier be located?

There are many potential places where a humidifier can be found in everyday life. However, there is one important aspect that you should keep in mind when choosing the right location for an air washer : to avoid mold formation, a distance of at least 10 to 30 centimeters should be maintained (depending on the model) to furniture standing around .

Placing the air washer directly in front of cupboards or walls is also not recommended: the moisture threatens to condense on the directly adjacent surfaces. The risk of mold growth is increased.

A location that is as free as possible in the room not only reduces the risk of mold formation, but also guarantees that the air enriched with moisture is optimally distributed in the room.