5 Best Building Dryers [ 2021 Edition ]

A construction dryer is practical for optimal air drying. Our team has viewed numerous tests on the Internet in order to be able to generate a list of Best Building Dryers. Nevertheless, reviews on performance, displays, continuous operation and other advantages could also be accommodated.

What is a construction dryer?

A construction dryer is a device that dehumidifies the air .

The various models are also known under the terms dehumidifier , room dehumidifier , condensation dryer or adsorption dryer .

Most drying devices work on the principle of condensation drying , which combines the function of a fan with a heat transfer .


The cooler areas of the heat exchanger support the condensation of the water, which then drips into the designated container .

Depending on the size of the dehumidifier , this water tank is emptied regularly or a hose leads the liquid directly outside.

To use these dehumidifiers , the surface temperature of the heat transfer element must be below the dew point of the surrounding air .

Only then will the device work properly.

Other construction dryers work with absorption by special liquids or with adsorption technology.

Which  system for the specific requirement is particularly well suited to inform the professionals from the construction industry as well as the helpful service staff in the respective shops and online stores.

As a proven Luftentfeuchtungsverfahren both in private and in the industrial sector is the condensation drying of the classics.

Most professional construction dryers rely on this simple and effective technology. With their consistent quality, they are suitable for both the construction phase and permanent use in damp cellars.

How does a construction dryer work?

The condensation dryers work on the basis of the formation of condensation. The condensed water , which was previously heated , settles on a cold surface .

This happens inside the dryer with the help of cooling fins or fins, which are constantly cooled and therefore colder than the air dew point.

The condensed water is collected in a container , after which the dehumidified air cooled by the device is released into the environment as heated dry air.

The basic principle is also used in other household appliances to use, for example in the dryer.

Important areas of application for such a construction dryer are damp rooms. After water damage , a professional renovation must be carried out, which also includes draining .

In this context , the powerful dehumidifiers are used, which are also used in house construction and support rapid building drying. The large, particularly efficient professional building dryers are indispensable for drying new buildings .

As long as no heating is installed, the foundation takes a relatively long time to dry properly . That is why the drying devices accelerate this process. In this way it is avoided that the moisture pulls into the already raised walls and thus spreads throughout the house .

The fast and reliable functioning of the condensation dryer ensures a continuous improvement in air dryness. This prevents any damage to the floor coverings and also to the walls .

By the natural principle of condensation drying can dryness not to normal levels exceed an over-drying is therefore excluded .

The procedure for the adsorption dryer is different. Here, a desiccant is used that removes the increased moisture from the room air . Due to the more complex methodology , these adsorption dryers are more expensive, but they can also be used in freezing temperatures and offer a higher performance.

In this way, a humidity of almost 5% can be achieved. However, it should just during use of building materials such as wood is important to ensure that this does not excessively dry out and thus become brittle.

Which construction dryer or dehumidifier is the optimal choice depends on the application and the ambient conditions . For home and apartment owners mainly offer condensation dryer which are involved in various sizes are available.

If the dryers are only to be used for a short time , a rental device is an option . In the event of water damage, which can be caused by a pipe break , for example , such a dehumidifier ensures the necessary dryness in the wall, in the floor and in the entire apartment within a few days . The moisture is then completely removed so that no mold can develop.


What types of dryers are available?

The numerous building dryers and dehumidifiers, which were checked in various  building dryer tests , are used to dry rooms and make them ready for occupancy.

The differences between the construction dryers can be seen in their size and performance and, as already mentioned, in their functionality.

The large professional construction dryers and screed construction dryers are used by construction companies and also show their efficiency in the industrial sector .

Smaller dehumidifiers offer in the private area the option of indoor climate in individual areas to improve.

The ventilation through open windows enough not getting out to the moisture from the air to remove. Therefore, the risk of damp walls increases, especially if the temperature differences between the inner and outer walls lead to condensation .

This is where a dehumidifier helps that runs continuously and relatively quietly and reliably regulates the air humidity .

The large construction dryers can handle up to 80 liters a day and are therefore the right choice for the construction phase.

Such a device is used, for example , when the screed is to be dried in a new building that has a volume of at least 200 cubic meters .

Professional building dryers are characterized by the following advantages and disadvantages :

Benefits from various tests:

  • high dehumidification performance even in rooms with large volumes,
  • suitable for screed drying,
  • precise display of the runtime,
  • stable design that is easy to maneuver by wheels,
  • short drying time.

Disadvantages from various tests:

  • heavy weight and bulky dimensions,
  • noisy operation.

Depending on the version, a compact room dehumidifier only manages 20 to 30 liters a day. They are suitable for dehumidifying basements or improving the indoor climate in individual rooms .

However , these devices are not suitable for rooms that are larger than 40 square meters or have more than 150 cubic meters .

Benefits from various tests:

  • small and handy,
  • automatic switch-off function,
  • sufficient for musty, damp cellars,
  • flexible application options.

Disadvantages from various tests:

  • low power,
  • unsuitable for larger rooms.

When testing the construction dryers , test persons also paid attention to the differences between condensation dryers and adsorption dryers .

The classic process of condensation drying has proven itself in many areas due to its reliability and efficiency .

Advantages of condensation drying:

  • Continuous reduction in air humidity so that there is no sudden drying: This has a gentle effect on the building structure,
  • no additional technical effort is necessary,
  • it is not necessary to remove the moist air, because the condensate is fed into a container or discharged through a hose,
  • typically the condensation dryers have an automatic defrost and an automatic switch-off when the level is reached,
  • low power consumption and high efficiency, as the energy from the air humidity is converted into heat,
  • low costs and simple operating principle.


  • temperature-dependent application range (between +6 and + 33 ° C),
  • moisture-dependent efficiency.

An adsorption dryer is used when the air humidity is already relatively low . You can achieve a particularly low humidity between 5 and 35% .

Typical applications for these dryers are the pharmaceutical industry, the chemical and storage systems. The adsorption dryers also deliver excellent results in cold rooms or in the construction of ships .

The advantages of the adsorption dryer:

  • Can also be used in freezing temperatures,
  • wide range of services,
  • the attainable air humidity is almost 5%,
  • diverse areas of application for almost all water damage,
  • no checking or emptying of water containers necessary.


  • due to fast technology there is a risk of over-drying, which can cause some building materials to crack
  • it is necessary to remove the humid air and remove the water vapor outside,
  • high power consumption due to the strong waste heat,
  • The heating element in the adsorption dryer leads to a run-on phase, which can lead to overheating, especially in household appliances.


The construction dryers were tested in tests

A construction  dryer test 2020 shows which options are available and which quality features are particularly important. The comparison and test winners of the construction dryers are particularly powerful and efficient, but the environment in which they are used must always be taken into account.

To create a basis that facilitates individual selection , it is therefore not sufficient to simply compare the performance data. The handling and suitability of the construction dryers also play a role in the tests .

  • From building drying to repairing water damage

The professional Bautrockner come to use, a thorough drying support.

The screed may only be walked on after drying and the construction work can be continued.

After water damage in the house or apartment, it is also worthwhile to install a compact or larger construction dryer .

A  test of the construction dryers shows how quickly these devices work  in a practical test.


  • Typical areas of application
  • The construction dryers in the external test were set up in comparable rooms to determine which product controls the air humidity particularly reliably .
  • For homeowners who are condensation dryer high on the wish list.
  • They quickly remove the moisture from the masonry and floors , so that the indoor climate improves noticeably.
  • Other applications for construction dryers
  • Not only in masonry work, even with activities such as painting, wallpapering and plaster is a dry air of advantage.
  • In addition, there are the Bautrockner in various industrial areas, in basements, storage and laundry rooms used.
  • Here the devices reliably ensure the necessary air dryness and reduce the risk of mold and musty smell.
  • Low maintenance
  • The comparison winners of the construction dryers are designed to be operated continuously . Maintenance is correspondingly easy .
  • The individual parts can be easily replaced if necessary , so that any necessary repairs can be carried out in no time at all.
  • The cleaning is correspondingly simple and ensures that the Bautrockner after the re- start running properly again.
  • The construction
  • The design of the dehumidifier is tailored to the respective use .
  • While the light, handy devices are often made of plastic , the large professional construction dryers consist of a sheet steel construction.
  • Safe screw connections and well thought-out maintenance flaps ensure high stability and practical operation.
  • The comparison test winner of the construction dryer convinces with its optimal robustness and correspondingly high efficiency.


What should I watch out for when buying a construction dryer?

When choosing a construction dryer or dehumidifier , the first step is the intended use.

In the case of minor water damage, a compact device is generally sufficient, while in the construction phase a powerful professional construction dryer is required to dry the screed and walls .

The performance plays a major role when it comes to suitable dryer pick. By Dehydrator, depending on the device at 20, 40 or 80 liters is, it is made clear how much moisture within a day from the space can be guided.

Even the small drying devices often have an impressive performance. In addition to the dehumidifier performance , the air circulation should also be taken into account.

This relates to the fans: if they work well, quick dehumidification is possible.

The different brands offer construction dryers in different shapes and performance levels . However, the selection criteria are not only found in the product descriptions , but above all in the suitability of the devices.

A medium-sized dehumidifier can be perfectly suitable for the basement, but it can work too loud in the event of water damage .

The electrical dehumidifiers are available in numerous performance variants.

For a house with damp masonry , the dryer should work with at least 900 watts to provide the necessary power . The normal dehumidifiers have between 300 and 1200 watts.

For individual damp rooms , the compact models with 300 watts are sufficient, while larger areas require a stronger building dryer . The size alone does not necessarily say anything about the performance of the devices , so you should definitely check the exact data .

The typical dehumidifiers are used at a room temperature between 5 and 32 ° C , with some models , information about further restrictions is given or they have an automatic defrost function.

If the temperature is too low , icing of the device is possible, but this should definitely be avoided . In warmer rooms , however, there can be problems with the motor cooling of the dehumidifier .

The existing humidity plays a role in the selection of building dryers. Many dryers only work effectively if they are used with a humidity of at least 35 and at most 80 % . If one or more walls are to be dried , the device should cover a humidity range of 30 to 90% .

For the determination of moisture one’s hygrometer or a special measuring device is required. This helps to keep control of the room air and to use the dehumidifier again if necessary.

The size of the water tank can play an important role when it comes to finding the right construction dryer . The container collects the condensed water and must therefore be emptied again and again until the air is dry enough.

The larger this container is, the less often it is necessary to empty it.

Most of the dryers have an automatic switch-off, so that the water tank does not overflow. However, if the device is to run in continuous operation , a garden hose can also be connected if necessary .

For this purpose , the building dryer or the water tank must have an appropriate connection . Such extras make operating the dehumidifier even easier.


Brief information on leading manufacturers of building dryers

The major brand manufacturers for small and large dryers rely on stable structures and simple operation.

Professional building dryers come from the companies Stahlmann, Trotec and Atika , for example . A  test for construction dryers also indicates various other manufacturers who rely on controlled quality and good performance .

Use the Bautrockner of AIRMEX , Heylo , Pro construction team , red fox or Timbertech can be the humidity reduce reliable. The various devices are used by private individuals as well as construction companies and other traders.

Internet vs. Specialist trade: where is the best place to buy my construction dryer?

The different versions of the construction dryers and dehumidifiers are presented on the Internet and in specialist shops with detailed information . The descriptions and pictures provide a good decision-making aid.

If you go directly to the store or hardware store , you can already get a few tips on how to use it from the specialist staff . A counseling helps the respective suitable device pick.

The individual data such as dehumidification performance and size of the water tank can also be understood via the product descriptions . These are both on the original packaging and on the Internet.

While the hardware store and the specialist shop rely on personal customer advice , there is the possibility to compare the different construction dryers directly with one another on the Internet . The list of device features and prices makes the decision particularly easy.

If you still have questions about the suitability or area of application of the dehumidifier , customer service can be contacted online or by phone . Here consumers can find out more details about the devices.

The availability is also often displayed in the Internet shops . In contrast , the comparison and the product search in the specialist shops require significantly more effort .

The special product information provides interested customers with information about energy recovery and the technology used , the resistance of the construction dryer and the additional safety functions.

An important selection criterion is the uncomplicated handling of the dehumidifiers in a test, but many consumers also pay attention to particularly good hygiene and a self-cleaning function. All of these extras provide the relevant information in specialist shops and on the Internet .

The advantage of the online comparison is also based on the experience reports and tests of the building dryer. This way, buyers can learn about the positive and negative experiences of previous users in advance .

In part, the Internet also used Bautrockner available which help the expenses to be reduced. Various shops also offer second-hand goods in this area or rent out the dryers.

However, the clarity of the online comparison and the practical ordering process ensure that buying a building dryer online is clearly ahead .

Interesting facts & advice on the use of construction dryers

The Bautrockner, as part of a building drying or after a severe water damage to the application come are generally for, purchase offered, but also rental deals can be found.

The construction industry is the most important area of application for the dehumidifiers , furthermore they are used for example in cellars or in industry . The dehumidifier is also suitable for a garage .

Especially collectors of classic cars put on the improvement of environmental conditions, because by the dry air the old ones are bodies not as strongly attacked. Some of the find Bautrockner even application in auto racing, because the work in the pit also requires a reduced humidity.


Building dryer: history and further details

The building drying itself has been around for many decades, however, has technology in recent times changed. To 1,900 were newly built houses and apartments to Erstmietern often the so-called dry residential or dry heating available.

They had in the first winter months no or reduced rent to pay and should at this time the moist air through the heating and ventilation gradually dry out. Until the 1970s, many were unfinished buildings over the winter frozen, the moisture from the walls and floors to draw.

Then new developments gradually came to accelerate the process of dehumidification . Among other things, the changed building materials and insulation materials were responsible for this.

The drying time was initially extended due to the new building materials , so condensation dryers were used to shorten the construction and drying phase again.

First was condensation drying used to houses , storage rooms , etc. from the excess moisture to liberate. This process is the basis of many construction dryers to this day .

The air humidity, which was initially much too high, was no longer perceptible after a few days . The success of the dehumidifiers can be clearly understood through the special measuring devices .

The formation of condensation with which a condensation dryer works leads to dry, warmed air, which noticeably improves the indoor climate .

This dehumidified air is also easier to heat and thus increases energy efficiency, a feature that was of great importance as early as the 1980s .

The condensation dryer and the desiccant dryer, which today are used to create, within a short time a pleasant atmosphere of air, precise to the respective field of application can be tuned.

The efficiency of the devices depends, among other things, on the humidity and temperature in the corresponding room. Through intelligent extras like an automatic shutdown and defrost functions it is not to malfunctions.

In addition, the innovative dehumidifiers are easy to handle, clean and, if necessary, maintain. Special constructions on castors are usually available for the large units , in order to place them in the desired position , while the small dehumidifiers can be carried easily.

The exact product data provide information about the possible use or the temperature range and the air humidity to be achieved.

Numbers, data, facts about building dryers

With professional building drying , the construction time can be shortened by a few weeks without resulting in damage from residual moisture .

The optimal room climate and air humidity can also save heating costs.

In the first three years of living in a new building , savings of a total of 300 to 400 percent are possible.

Many professional construction dryers have an external collecting container for the condensed water.

This is filled through the corresponding drain hose of the device . So you can watch directly how the water is filtered from the air .

In order not to have to constantly empty such an external container , it can be combined with a submersible pump .

This ensures that the container does not overflow because it pumps the water out through the hose routed to the outside .

The use of such a construction dryer with an external tank and submersible pump depends on the environment and the expected drainage intervals.

The complete system is particularly worthwhile for construction sites of multi-family houses or several single-family houses that are managed by the same construction company .

In the permanent drying also an additional can condensate pump can be used. This automatic pump is an aggregate that can compensate for a height difference of three or four meters with its pumping capacity .

The constant water drainage is also possible across floors. This can be depending on requirements dryer solution should turn on or off, so with a few simple steps , the usual non-permanent drying is restored.

The hygrostatgesteuerte Bautrocknung is useful when an over-drying is to be excluded. Critical areas in which this process is used are special building materials or types of wood that can become brittle in extremely dry indoor air .

This can be the case, for example, if a historic building is gutted as part of a renovation . Any damage can be avoided with precise control .

The hygrostat, which can be coupled with the dehumidifier , allows a targeted setting of the construction dryer and ensures that the degree of drying is not too strong.


Rent or buy construction dryer?

If the construction dryer is only needed for a short period of time , it may make sense to rent it and not to buy it. In addition to the rental costs themselves, electricity consumption should also be taken into account.

Depending on the performance and design , a conventional building dryer consumes between 300 and 1200 watts per hour.

If it runs in continuous operation , this means a power consumption of 7.2 to 28.8 kWh for the period of 24 hours. Based on the average electricity price , this can lead to additional costs of up to € 8 per day .

To ensure that the masonry and the screed are absolutely dry, the building drying should not run too short a day.

The experts and professionals from the construction industry know about the usual operating time decision and inform inexperienced builders like to have the required rental period for the dehumidifier.

If it is used in a new building , the device should run for about two to four weeks depending on its  size and performance .

If the dehumidifier , however, for the elimination of water damage is used, a sufficient useful life of one to two weeks off.

The test with the hygrometer shows whether the desired air humidity has been reached or whether the building dryer should be operated for a while .

The large construction dryers are made available on a weekly basis by many providers .

Depending on the required operating time and the selected model worth at a certain phase of the purchase of Bautrockners, because the costs for five to six weeks have amortized.

In addition, the smaller models in particular can also be used later, for example to get damp basement rooms dry again. It is also possible to lend the device to relatives or friends if it is a compact, portable dehumidifier .

The use of construction dryers reduces the air humidity in any case , but it cannot solve the actual cause . If moisture penetrates into the basement or the inner wall of the weather side keeps getting wet, it makes sense to take further measures .

Even those who have bought a room dehumidifier should therefore consider whether the phased or permanent operation is the right solution to the moisture problem .

A drainage or insulation layer may help . Also, specialty products for dry walls , Restoration and Klimaplatten help the moisture to decrease.


There are many questions regarding the locations and variants of the construction dryers that deal with the functionality and the effects .

A construction  dryer test 2020 provides practical information on the suitable devices and the numerous boundary conditions that must be observed when selecting and commissioning .

  • What must be considered before starting up the construction dryer?

The building dryer should be installed in a stable manner on a horizontal surface and not positioned directly on a wall . The power cable must not be under tension to avoid tripping hazards .

  • Can the construction time be shortened by using a strong construction dryer?

A powerful professional Bautrockner withdraws within a few days , the moisture from the air, the walls and the floor of the new building. In this way, follow-up work can be started earlier .

This in turn leads to the timely completion of the entire construction project. The house is ready for occupancy at an earlier date , which means a clear advantage for the client .

  • In which temperature and humidity range can a condensation dryer be used?

Condensation dryers are suitable for an ambient temperature of at least 5 ° C and a maximum of 30 ° C. The rooms in which the devices are used should have a relative humidity between 40 and 90% .

  • Is high energy consumption to be expected?

A dehumidifier offers good energy efficiency. It uses little electricity and uses the energy of the humid air to convert it into heat . In the end , the use of the dryer has a positive effect on efficiency .

  • Does the window have to be opened so that the moist air can be removed?

It is not necessary to open windows or doors to remove the moisture . Instead, the condensed water collected is collected in a container or discharged through a hose connected to it .

  • Does building drying have a negative impact on the building fabric?

No, drying the building poses no danger to the building , because the air humidity is only gradually reduced, not suddenly.

  • What is special about adsorption drying?

The adsorption dryers or drying cabinets work with desiccants and with a certain type of dehumidification process. Here, temporary or permanent processes possible.

The Rotationsentfeuchtung maintain continuous and permanent dehumidification. Since the construction of such a device is not airtight, a minimum of about 5% relative humidity can be achieved.

The tripod chamber principle , on the other hand, offers the possibility of reaching a humidity of almost 0% .

  • In which temperature and humidity range is the adsorption dryer used?

The adsorption is suitable for rooms that one twice as large volume have as the amount of dry air that the dryer generates.

This Bautrockner with adsorption are suitable for a temperature between -10 ° C and + 30 ° C. They can be used at a humidity between 0 and 100 % and ensure excellent results.


Useful accessories for construction dryers

The construction dryers from various  tests provide special features and accessories for targeted operation and practical handling. Often they have a digital control unit, which the setting of the desired humidity allows and also the monitoring of the current ambient air easier.

In the case of smaller devices without this equipment , it can be helpful to use an additional hygrostat , which can be installed if necessary or used individually.

It allows exact control over the current room climate and indicates whether further dehumidification is necessary .

Many building dryers and dehumidifiers have an automatic shutdown. This deactivates the device as soon as the desired air humidity or the set room climate has been reached. This function can not usually be retrofitted.

In some models , the automatic switch-off means the deactivation because of the filled water tank . When checking the device features, you should pay close attention to the function to which this automatic relates.

Various accessories for the construction dryer increase the possible uses and simplify operation.

The water tank does not need to be emptied by a condensate pump . An air filter ensures an improved indoor climate and is particularly suitable for dehumidification after water damage.

Since the larger construction dryers are difficult to handle, they should be transported on construction rollers or an appropriate chassis . These accessories are often offered together with the construction dryers .

Furthermore, extension cables, additional heaters and fans a helpful supplement. They ensure an optimal dehumidification result and a reliable functioning of the construction dryer.

Through a reliable cabling and the option of the various devices after a certain period at a different location to position, one is swift and thorough Bauaustrocknung guaranteed.

When using an adsorption dryer , it may be necessary to produce an outlet or outlet device . These conduct the extracted, moist air outside. In case of need , the blank Bautrockner and the openings with additional pipe elements combine so that the moisture within the non building can escape.

Alternatives to the construction dryer

The different types of construction dryers from many  tests can be supplemented with other devices , but there is no comparable replacement . As an alternative , regenerative drying systems are suitable, for example , which are used in private apartments but also in laboratory rooms .

The humidity and to reduce the heat to increase, may also heaters are situated. By the air warm, they support the process of drying. A special form is the heating gun, which is often used to dry new buildings thoroughly and quickly .

The right ventilation behavior is not a real alternative, but a good aid measure . The windows should be opened several times a day to stimulate air circulation . This prevents mold from settling on the walls , and the fresh air can then be warmed up better.

However, a large temperature difference between the interior and the outside air leads to condensation forming on the windows or on the weather side , which increases the humidity in the room again. The room air is circulated and distributed by fans .

In combination with a dehumidifier , the fan ensures a better overall climate. In this way, the drying process of the construction dryers can be accelerated in various tests .



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