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Home Comfort
  1. Products & Services
  2. Products ‑ HomeComfort
  3. Dehumidification
  4. Condensation dehumidifier of the TTK-series
  5. TTK 99 HEPA

Dehumidifier and air cleaner TTK 99 HEPA

The most powerful in its class: 31 l dehumidifier + HEPA air cleaner with 95 % efficiency to protect against mould, bacteria, viruses, dust, pollen and allergens

Maximum dehumidification and drying with 95 % HEPA air purification

If moisture becomes a health issue in your private living environment, your garage or at your workplace, the dehumidifier TTK 99 HEPA reliably and permanently provides for a healthy room climate. Thanks to its high dehumidification performance of 31 litres/day, which is unchallenged in its device class, the mobile dehumidifier is perfect for room sizes up to 90 m² or 230 m³. Even drying moist masonry, for example after heavy rainfall or floods is a task mastered easily by the compact power pack with its strong air performance of 170 m³/h – making it a match for conventional construction dryers. With its modern design, a black, set-off control panel as well as handles embedded in the housing to allow for a quick change of location, the TTK 99 HEPA is optically appealing.

Outstanding design, impressive dehumidification performance

The inner values of the TTK 99 HEPA which combines two technologies in one to improve the room air are just as unique as its product design. In the dehumidification mode, the 2-in-1 dehumidifier regulates the air humidity to the level you desire, offering a user-definable target value in the range of 30 % to 80 %. Moreover, the air is cleaned in the dual filter system, which consists of a prefilter and a HEPA filter, and 95 percent of pathogens such as viruses, bacteria and mould spores as well as pollen, house dust/particulate matter, allergens and other airborne pollutants are removed.

A vital contribution for a healthier life and healthier working – a noticeable relief particularly for allergy sufferers and people with house dust allergies.

A powerful ally when humidity becomes an issue. The TTK 99 HEPA dehumidifies:

  • Living spaces
  • Shops
  • Damp garages
  • Office environments
  • Conservatories.
  • Archives
  • Storage facilities
  • Sports/fitness rooms
  • Laboratories
  • Holiday homes
  • Wet basements
  • Changing rooms

The hygrostat-controlled automatic dehumidification function with target value preselection of the humidity level (30 % to 80 %), digital air quality sensors, four operating modes including a laundry drying function and permanent operation, a silent night mode as well as a two-stage fan guarantee reliable dehumidification and cleaning of the room air. An overflow protection ensures that the device switches off when the max. filling level of the 4 litre water tank is reached. The hose connection offers an even more enhanced level of comfort to discharge the condensate conveniently via the hose that is already included in the scope of delivery. A practical feature is the modern 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 99 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 99 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.

A leader in terms of performance and equipment

All dehumidifiers of the TTK series convince with an excellent comfort equipment, a high level of operational comfort as well as a remarkably low noise emission, making the mobile air fresheners also perfect for the use in noise-sensitive environments (bedrooms, children's rooms, office environments).

Continuous operation: Condensation on the windows and walls, thermal bridges, or an insufficient ventilation system are frequent reasons for moisture issues, but also if groundwater/rainwater penetrates the basement in the case of flood or heavy rainfall. To ensure quick dehumidification of such environments, the TTK 99 HEPA is provided with a powerful permanent mode with a max. dehumidification performance of 31 litres/day. If the permanent mode is selected, the room air is permanently dehumidified at maximum power.

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 99 HEPA offer the benefit of drying laundry as gently as in the nature outside.

Night mode: Stuffy air can literally deprive you of your sleep. In addition to the moisture emitted by breathing, sweating also increases the humidity to an unhealthy level. In the night mode with a dimmed control panel, the TTK 99 HEPA regulates the humidity level with a gentle airflow and a low noise emission.

Child lock: In order to protect the device settings against curious child's hands, the control panel can be locked with the practical child lock function.

24-hour timer: There are good reasons to switch the TTK 99 HEPA on or off in a time-controlled fashion. In the bedroom and in the children's room, we recommend the combined operation of dehumidification and purification to allow for a restful sleep. During the day, on the other hand, dehumidification is rarely necessary when the family is out of the house. Similarly, dehumidification and purification of the air at the workplace are only necessary during working hours. To adapt the dehumidification time to your individual rhythm of life, the TTK 99 HEPA comes equipped with an integrated programmable 24-hour timer, allowing you to preset the operating time until automatic switch-on or switch-off in increments of 1 hour.

The dehumidifier TTK 99 HEPA inspires design enthusiasts. The device regulates the room air humidity to a healthy level and, thanks to the integrated HEPA air purification feature, protects against viruses, bacteria, mould spores and other airborne pollutants.

TTK 99 HEPA – special equipment features

TTK 99 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 99 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 99 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 99 HEPA – control panel
The control panel of the TTK 99 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 99 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 air filter retains lint and animal hair and can be quickly and easily wiped or washed out.
TTK 99 HEPA – water tank
The removable water tank has a storage capacity of 4 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 99 HEPA – hygrostat-controlled automatic dehumidification system
In hygrostat-controlled automatic dehumidification mode, the TTK 99 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 99 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 99 HEPA – laundry drying function
The TTK 99 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 99 HEPA – permanent mode
In the permanent mode, the TTK 99 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 99 HEPA in the office
Whether at home, in the office or in the bedroom – the TTK 99 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 99 HEPA in private libraries
In order to prevent the formation of unwelcome mould that is dangerous to your health in private libraries, living rooms, unheated conservatories, hobby rooms, 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 90 m² / 230 m³
  • Dehumidification performance max. 31 litres / 24 hours
  • Air quality indication with colour LED
  • Indication of the relative humidity level
  • Permanent mode
  • Timer function (1-24 hours)
  • Auto restart function (memory function)
  • Child lock 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. 4 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 99 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 99 E

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” …


Luftentfeuchter und Luftreiniger TTK 99 HEPA show in Trotec online shop

Luftentfeuchter und Luftreiniger TTK 99 HEPA

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Technical data

Technical data
General information
  Article number
Dehumidification performance
  At 30 °C / 80 % RH [l/24h] 30
  Max. [l/24h] 31
Air flow rate
  Level Max. [m³/h] 170
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] 3.38
  Power input [kW] 0.72
  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] 90
  GWP factor 3
  CO2 equivalent 0.00027 t
  Pressure suction side [MPa] 1.2
  Pressure outlet side [MPa] 2.5
Water tank
  Contents in [l] 4
Sound values
  Distance 1 m [dB(A)] 51
  Length (packaging excluded) [mm] 250
  Width (packaging excluded) [mm] 370
  Height (packaging excluded) [mm] 585
  (packaging excluded) [kg] 17
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
  Specification of the hour
Functions and features
  Continuous operation
  Laundry drying function
  Operating control lamp
  Air quality display
  Indication of the current room humidity level
  Display of the set humidity
  LED display
  Automatic fault diagnosis system
  Memory function
  Auto restart function
  Child lock
  Night mode
  Cable holder
  Plastic wheels
  Recessed handles
Condensate drain
  Hose included in the scope of delivery
  Hose connection possible
  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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