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TTK 27 HEPA – design dehumidifier
Home Comfort
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  2. Products ‑ HomeComfort
  3. Dehumidification
  4. Condensation dehumidifier of the TTK-series
  5. TTK 27 HEPA

Design dehumidifier and air cleaner TTK 27 HEPA

The perfect combination for a healthy room climate: 12 l dehumidifier and HEPA air cleaner with 95 % efficiency to protect against mould, bacteria, viruses, dust, pollen and allergens

Cleverly combined: Dehumidifier and air cleaner with 95 % HEPA filtration

Enjoying indoor air. Making this and even more possible in an outstanding way – the multifunctional design dehumidifiers TTK 27 HEPA and TTK 64 HEPA. Equipped with even two technologies for permanently improving the air quality, the combination devices eliminate unhealthy humidity in living and business spaces, offices, shops, unheated conservatories, basements as well as garages. Moreover, the room air is cleaned in the integrated HEPA filter and 95 percent of pathogenic bacteria/viruses, mould spores, pollen, house dust, particulate matter, allergens and other pollutants are removed. A permanent protection of health for everyone in the room – a noticeable relief particularly for allergy sufferers and people with house dust allergies. The modern dehumidifiers are available in a rectilinear cuboid design with chamfered edges and a structured surface in two versions and device sizes.

Everything inside – for healthier room air and more quality of life

A hygrostat-controlled automatic dehumidification system with target values for the desired humidity level (30 % to 80 %), digital air quality sensors, four operating modes including night mode and two fan stages guarantee a reliable dehumidification and air purification process. For unattended continuous operation, the device with overflow protection is further equipped with a hose connection at the rear to permanently discharge the condensate extracted from the air via a hose. A practical feature is the front colour LED display which indicates the status of the room air quality in three colours (blue, green, red). The LED illuminated segment display keeps you informed about the current humidity with percent accuracy, the preset target humidity and the remaining operating hours (with activated 24-hour timer) for time-controlled switch-on or switch-off.

Seeing the room air with different eyes: Air quality sensors

We cannot tell from the room air whether it is too humid or contaminated with pathogens by simply looking at it. You might normally notice that mould spores or viruses are invisibly floating in the air when it is already too late.

The room dehumidifier TTK 27 HEPA notices what we don't. Its digital humidity sensors continuously measure the room humidity level. The front colour LED display for the current room humidity is particularly convenient:

  • Blue: Indicates that the humidity is too low/dry (below 50 %).
  • Green: Indicates an optimum humidity level (between 50 to 70 %).
  • Red: Indicates that the humidity is too high (above 70 %).
Seeing the room air with different eyes: Air quality sensors
Product brochure Practical guide to air dehumidification


Moisture in the bathroom, basement or bedroom can lead to mold. All relevant information about our comfort dehumidifiers can also be found in the product brochure. Download the PDF directly here.

To the PDF document

Gentle laundry drying with dehumidifiers

Apart from ambient air dehumidification, a dehumidifier can be conveniently used for drying laundry – either in an assisting way or as a full replacement for a conventional dryer. The laundry drying function (also referred to as clothes drying mode or SuperDry function) is comparable to traditional air drying outside.

Dehumidifiers offer the benefit of drying the laundry as gently as in the nature outside. Colours retain their brilliance and the life span of clothes is longer than with conventional dryers – and all this with a substantially lower power consumption.

Furthermore, even sensitive materials such as wool, silk or synthetic fibres can be dried without any problems. In contrast to pure air drying, the laundry feels much softer and more pleasant on your skin.

Laundry drying can also be performed with dehumidifiers without an additional laundry drying function. The target value of the air humidity must then be set in accordance with the desired residual humidity:

Cupboard dry: 46 % of relative air humidity

Iron dry: 58 % of relative air humidity

Skin dry: 65 % of relative air humidity

Laundry-drying function
Environmentally friendly refrigerant R290

Propane (R290) as environmentally friendly refrigerant in dehumidifiers

Every year, several million tonnes of environmentally harmful CO2emissions (greenhouse gases) are emitted into the air by synthetic refrigerants. For this reason, the utilization of alternative refrigerants has become one of our key objectives. By using propane (R290) as refrigerant, this dehumidifier makes a valuable contribution to protecting our climate.

The natural refrigerant propane (R290) is an organic compound belonging to the group of hydrocarbons. Unlike synthetic refrigerants the environmentally friendly propane (R290) comes with neither ozone depletion potential (ODP = 0) nor a noteworthy greenhouse effect (GWP = 3).

Additional bonus for the environment: Owing to its excellent thermodynamic properties, propane (R290) is a particularly energy-efficient refrigerant thereby additionally reducing your energy costs.

Purified and dehumidified room air makes the difference

Each person needs between 10,000 and 20,000 litres of air per day for breathing in and out. If the air is too humid and contaminated with pollutant particles or pathogens, it puts our immune system to the test and – in the worst case – triggers respiratory diseases. Likewise, the furniture, inventory and even the building structure can be damaged if the humidity level is permanently too high (> 60 percent).

Combined protection against humidity and pathogens

Rely on the TTK 27 HEPA with highly effective HEPA air purification technology to protect your health and furnishing and to monitor the room air quality simply and conveniently. With its combined air purification and dehumidification technology, this multi-talent reliably prevents the formation of unhealthy mould cultures and associated moisture problems such as mould formation, mildew stains and dampness. Virus-carrying aerosols, viruses (for example SARS-CoV-2 and influenza viruses), bacteria, mould spores, particulate matter, house dust, animal hair and other airborne pathogens are removed from the room air in the dual filter system consisting of a prefilter and a highly efficient HEPA filter. Besides, the growth of dust mites and allergens is reduced. An all-round clean affair.

Auto restart function

Auto restart function

In case of an unexpected switch-off due to a power interruption, the auto restart function (or “Memory function”) makes the device restart with the previously selected setting as soon as the power supply has been restored. This makes the dehumidifier also suitable for combined use with a timer.

Comprehensive solution for a healthy indoor climate

The visually appealing 2-in-1 dehumidifiers/air cleaners TTK 27 HEPA and TTK 64 HEPA have a comprehensive range of comfort features, a high level of user comfort and a pleasingly low noise level in common. Therefore, the air improvers are also recommended to be used in noise-sensitive environments.

Hygrostat-controlled automatic dehumidification: In hygrostat-controlled automatic dehumidification mode, the TTK 27 HEPA works continuously until the desired humidity value is reached. This value can be adjusted in increments of 5 % in a range between  30 % and 80 %. Then the compressor switches off automatically. When the target value is exceeded again, the device is automatically activated. This way, the TTK 27 HEPA always provides for an ideal room humidity level according to your needs.

Continuous operation: Condensed water on the walls, on glass surfaces or thermal bridges and insufficient ventilation at the same time are frequent causes for moisture damage. Moisture damage also occurs if water enters the basement from the outside through an insufficiently insulated wall or during floods and heavy rain fall. For keeping such environments permanently dry, the TTK 27 HEPA comes with a powerful continuous operation mode. If this operating mode is selected, the room air is permanently dehumidified at maximum power.

Night mode: Poor air quality caused by an excessive humidity level, unpleasant odours or stuffy air can basically make you lose your sleep. In night mode, the TTK 27 HEPA cleans and dehumidifies the air with a gentle airflow and a dimmed control panel. For a good night's sleep to recharge your batteries.

Laundry drying function: For air drying your laundry in a gentle way, we recommend the laundry drying mode. The laundry drying function (also referred to as clothes drying mode or SuperDry function) is comparable to traditional air drying outside. Dehumidifiers such as the TTK 27 HEPA offer the benefit of drying laundry as gently as in the nature outside.

24-hour timer: There are good reasons to switch the TTK 27 HEPA on or off after a preset number of hours. In the bedroom, we recommend a combined operation of dehumidification and purification to allow for a restful sleep. During the day, on the other hand, it is not necessary to keep the device running when you are out of the house. Similarly, dehumidification and purification of the air in the office or workplace are only necessary during working hours. For these and other applications, the TTK 27 HEPA is equipped with a programmable 24-hour timer. This allows you to preset the number of operating hours until automatic switch-on or switch-off in increments of 1 hour.

The living-space friendly design dehumidifier TTK 27 HEPA convinces by both its compelling appearance and also with regard to its technical features. The device regulates the room air humidity to a healthy level and, thanks to HEPA filtration, protects against viruses, bacteria, mould spores and other airborne pollutants.

TTK 27 HEPA – special equipment features

TTK 27 HEPA – colour LED display
Design and functions: The colour LED display indicates the status of the current room humidity. The LED is blue when the room humidity falls below 50 %. It is green when the humidity ranges between 50 – 70 %. Red means the humidity has increased to above 70 %.
TTK 27 HEPA – colour LED display
Design and functions: The colour LED display indicates the status of the current room humidity. The LED is blue when the room humidity falls below 50 %. It is green when the humidity ranges between 50 – 70 %. Red means the humidity has increased to above 70 %.
TTK 27 HEPA – colour LED display
Design and functions: The colour LED display indicates the status of the current room humidity. The LED is blue when the room humidity falls below 50 %. It is green when the humidity ranges between 50 – 70 %. Red means the humidity has increased to above 70 %.
TTK 27 HEPA – control panel
The control panel of the TTK 27 HEPA is provided with a clear design and is easy to understand. The digital display shows you the current value of the relative humidity in the room, the preselected humidity value and the set number of hours of the timer.
TTK 27 HEPA – filter
The easy-to-change HEPA filter removes up to 95 % of all airborne pollutants (e.g. bacteria, viruses, pollen, mould spores, particulate matter, allergens) from the room air. The easily removable prefilter retains lint and animal hair and can be quickly and easily wiped or washed out.
TTK 27 HEPA – water tank
The removable water tank has a storage capacity of 2.5 litres. The device stops automatically when the tank is full and indicates this via LED. In order to continuously drain the condensation water, a pipe can be connected on the rear of the device.
TTK 27 HEPA – hygrostat-controlled automatic dehumidification system
In hygrostat-controlled automatic dehumidification mode, the TTK 27 HEPA operates continuously until the set relative humidity reaches the range from 30 and 80 %, after which the compressor switches off automatically. When the target value is exceeded again, the device is automatically activated.
TTK 27 HEPA – timer function
Use the practical timer function to switch the device on or off after a defined number of hours. The time can be programmed in increments of 1 hour (1 to 24 h). The use of the timer prevents unnecessary operating periods and allows you to adapt the dehumidification to your individual rhythm of life.
TTK 27 HEPA – laundry drying function
The TTK 27 HEPA may also be used as a room air laundry dryer to dry wet laundry in living spaces or utility rooms. In this way, you speed up the drying process of the clothes and prevent the humidity contained in the clothes from condensing in the room and from becoming a hotbed for mould.
TTK 27 HEPA – permanent mode
In the permanent mode, the TTK 27 HEPA dehumidifies the room air in continuous operation. This is especially suitable for cellar or storage spaces which are subjected to mould formation by excess humidity. To avoid that you constantly have to drain the water tank, a condensate drain hose can be connected.

TTK 27 HEPA in the living room
Whether at home, in the office or in the bedroom – the TTK 27 HEPA dehumidifier ensures an optimal room climate at all times thanks to its hygrostat-controlled automatic dehumidification system, continuous measurement and indication of the relative humidity level by means of air quality sensors, HEPA air purification, laundry drying function and timer function.
TTK 27 HEPA in the studio
In order to prevent the formation of unwelcome mould that is dangerous to your health in studios, unheated conservatories, bathrooms or on cool corners and walls exposed to dampness in the first place, we recommend using a dehumidifier continuously and right from the start.
Technical data by comparison

All TTK dehumidifiers in direct comparison:

To find the dehumidifier which exactly meets your requirements, please consult the concise overview of all TTK dehumidifiers from Trotec, which we're providing to you here so that you can compare them directly to each other.

Models which you do not wish to include in your comparison can be easily dismissed with only one click.

Technical data by comparison

A few practical benefits:

  • Combined dehumidifier with HEPA air cleaner (95 % effective HEPA filtration of bacteria, viruses, pollen, particulate matter, dust mites, mould spores and other allergens and pollutants).
  • Hygrostat-controlled automatic dehumidification system with target value preselection between 30 and 80 % RH in steps of 5 %
  • Once the desired humidity value has been reached, the compressor will switch off automatically. The fan keeps running. When the value is exceeded, the device is automatically activated.
  • Suitable for rooms up to 15 m² / 37 m³
  • Dehumidification performance max. 12 litres / 24 hours
  • Air quality indication with colour LED
  • Continuous operation for uninterrupted dehumidification in unattended rooms
  • Timer function (1-24 hours)
  • Night mode (ultra-silent)
  • Auto restart function (memory function)
  • Overflow protection – the device switches off when the water tank reaches full capacity
  • Warning signal to indicate a full water tank
  • Water tank: approx. 2.5 litres
  • Two fan stages
  • Connectivity for a drain hose for continuous operation
  • Clothes drying function

 standard equipment

 optionally available

 not available

Room size suitability of the TTK 27 HEPA

Which device to use for which room size?

Here you find a specific performance chart for the suitability of each comfort dehumidifier. It indicates the room size in combination with an area and volume scale.
Click to enlarge in a new window ...

Product finder for dehumidifiers

We help you find the suitable dehumidifier that meets your requirements!

With our product finder you can quickly and easily choose the ideal dehumidifier for your application scenario.
Click here to go directly to the product finder

Socket hygrostat BH30 with dehumidifier TTK 27 HEPA

Save electricity and money on dehumidification

With our socket hygrostat BH30 you can additionally save money when dehumidifying damp rooms or keeping rooms dry. The programmable switch is simply plugged in between the dehumidifier and socket to regulate the dehumidification process based on the measured humidity level.

Once the desired target humidity is reached, the hygrostat disconnects the device from the mains until dehumidification is required again. By switching off the compressor and fan during standby times, the device's energy consumption is noticeably reduced.

The initial acquisition costs of the BH30 will have been amortized in a minimum of time.

Moreover, many dehumidifiers only offer rough target value setting for optimum humidity. The hygrostat BH30 allows the room humidity level to be adjusted in increments of 1 % from 20 % to 90 % and thus offers significantly more precise target humidity selection.

Thermohygrometer BZ05 and design weather station BZ06

Our recommendation for climate control:

The room thermohygrometer BZ05
Simultaneous display of room temperature, humidity level and time or date as well as an additional feel-good indication.

The design weather station BZ06
Simultaneous indication of room temperature, humidity level, date, time, weekday and symbolic weather forecast. Supplies helpful information for preventing mould growth.

Adsorption, condensation or Peltier dehumidifier?

Trotec, your dehumidification expert, has compiled the most important facts in a reader-friendly overview!

Direct link to “Practical knowledge of dehumidifiers” …


Technical data

Technical data
General information
  Article number
Dehumidification performance
  At 30 °C / 80 % RH [l/24h] 10
  Max. [l/24h] 12
Air flow rate
  Level Max. [m³/h] 90
Recommended room size dry keeping
Ambient conditions
  Min. temperature range [°C] 5
  Max. temperature range [°C] 32
  Min. humidity range [% r.F.] 30
  Max. humidity range [% r.F.] 80
Electrical values
  Mains connection 220 - 240 V, 50 Hz
  Nominal current consumption [A] 1.4
  Power input [kW] 0.245
  Recommended fusing [A] 10
Electric connection
  Connection plug CEE 7/7
  Cable length [m] 1.8
  Reciprocating piston compressor
  Rotary piston compressor
  Minimum room size [m²] 4
  refrigerant R290
  Amount of refrigerant [g] 30
  GWP factor 3
  CO2 equivalent 0.00009 t
  Pressure suction side [MPa] 1.2
  Pressure outlet side [MPa] 2.5
Water tank
  Contents in [l] 2.5
Sound values
  Distance 1 m [dB(A)] 45
  Length (packaging excluded) [mm] 245
  Width (packaging excluded) [mm] 245
  Height (packaging excluded) [mm] 500
  (packaging excluded) [kg] 9.5
Equipment, features and functions
Automatic defrost system
  Air circulation / electronic
  Hot gas
Automatic dehumidification
  stages 2
Condensate tank monitoring
  Container available
  Filling level warning light to indicate a full water tank
  Overflow protection with automatic switch-off
Room air filter
  Readily accessible
  Pre-filter Synthetic fibre
  HEPA filter HEPA filter
  Filter efficiency 95%
Timer function
  Switch-off time can be preselected
  Switch-on time preselectable
Functions and features
  Continuous operation
  Laundry drying function
  Fan function
  Operating control lamp
  Indication of the current room humidity level
  Display of the set humidity
  Air quality display
  Automatic fault diagnosis system
  Memory function
  Night mode
  Dimmable display
  Auto restart function
  Plastic wheels
  Recessed handles
Condensate drain
  Hose connection possible
  Hose included in the scope of delivery
  Recommended hose size [mm] 10
  Condensate pump
Control panel
  LED display
Adjustable air discharge direction
  Swing function
Housing design

 standard equipment

 optionally available

 not available



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