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TTK 122 E – comfort dehumidifier
Home Comfort
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  2. Products ‑ HomeComfort
  3. Dehumidification
  4. Condensation dehumidifier of the TTK-series
  5. TTK 122 E (2021)

Comfort dehumidifier TTK 122 E

Dehumidification performance of 40 l/24 h for a healthy room climate and fast drying after water damage – suitable for private and commercial use

Dehumidifies living spaces, dries basements and removes water damage

The comfort dehumidifier TTK 122 E protects and preserves what is dear to you – the health of your family and your own four walls. For children, the elderly and people with respiratory diseases, excessively humid room air is a constant burden. The building structure and inventory, too, suffer from excessive humidity after heavy rainfall, storms, floods or burst water pipes. The TTK 122 E with automatic hot gas defrost system provides a quick and lasting remedy here – for optimum drying results, even at low temperatures.

One for all: prevents mould, corrosion and structural damages

Excessive moisture in the room air (> 60 percent) provides a perfect hotbed for pathogens. Mould spores spread in the living spaces and increase the risk of catching a respiratory disease. Damp walls and floors after water damage also favour the formation of mould, which is hazardous to health. Similarly, vintage cars in the garage, works of art on the walls and archived documents and books also suffer from excessive humidity. The causes of harmful humidity are manifold: defects in the building's waterproofing, insufficient ventilation as well as storms, floods or leaks in water-bearing lines.

Compact design – outstanding dehumidification performance

Whether as a room climate improver in private surroundings or as a construction dryer for commercial use – the cuboid stainless steel dehumidifier TTK 122 E impresses with its convenient features (e.g. the 24h timer and auto restart function as well as the control panel lock function), an 8-litre condensation tank and a high dehumidification performance of 40 l/24 h at an air flow rate of 240 m³/h – enough to handle rooms sized up to 120 m² or 300 m³. The auto restart function (memory function) makes the device restart automatically with the previously selected settings after a brief power cut. Good to know: smaller rooms can be conveniently dehumidified with the structurally identical TTK 120 E with a dehumidification performance of 30 l/24 h and an air flow rate of 240 m³/h.

For maximum user comfort, the control panel is equipped with easy-to-clean membrane keys and a digital display indicating the room temperature and humidity. The target humidity can be selected in increments of 5 percent. Moreover, a filling level warning light to indicate a full water tank, an overflow protection with automatic switch-off function and a reusable air filter, which is easy to clean, also belong to the standard equipment of the electronically defrostable TTK 122 E.

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

Investment protection for your drying devices

Particularly during construction drying operations in summer or when drying water damages, it is very likely that climate conditions arise which may significantly shorten the lifetime of condenser dryers – regardless of the make. We as manufacturer care about the fact that for process-related reasons your condenser dryers often have to be replaced much too soon, hence we have prepared a valuable practical recommendation relating to the investment protection of your drying devices. Click here to find out more ...

Technical construction drying

Did you know that every construction dryer is at the same time a commercial dehumidifier, but that not every commercial dehumidifier is automatically a real construction dryer? Here you can find out the reasons for this, and why hot gas defrosting makes the decisive difference ...

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.

Proven drying technology for a healthy indoor climate and for drying damp masonry and floors

Thanks to its rust-proof stainless steel housing, bar handles on both sides and rubber-tyred easy-running wheels, the robust TTK 122 E withstands even the harshest of conditions at its place of use.

A dehumidifier for all occasions:

  • Optimally suited for a healthy indoor climate in living spaces
  • Protection against moisture in archives, libraries and art exhibitions
  • Protection against corrosion and mould in (vintage car) garages, basements and storage rooms
  • Construction site drying and drying of damp masonry after water damage

Connection for external condensate drain

For applications where regular draining of the 8-litre condensation tank is either not possible or undesirable, e.g. for unattended permanent drying in basements, garages, holiday homes or on boats, the TTK 122 E comes equipped with an integrated hose connection for direct discharge of the condensate into a drain. The hose required for this is already included in the standard scope of delivery.

Automatic hot gas defrosting for faster drying results

At low temperatures (below 12 °C), the integrated automatic hot gas defrost system ensures continued reliable dehumidification – without long defrost phases. In contrast to time-consuming air circulation defrosting used in normal condenser dryers, the TTK 122 E is defrosted by introducing hot gas into the evaporator. This helps to reduce the defrosting time considerably and to reach the drying target more quickly.

SuperDry function for an accelerated drying of textiles

A convenient feature for quickly dehumidifying wet laundry, clothes or carpets is the special SuperDry function. This way, even large textiles that do not fit in the tumble dryer can be dried in a very short time.

With the comfort dehumidifier TTK 122 E you are perfectly equipped for almost all drying and dehumidification tasks in private and commercial surroundings – recommended for rooms sized up to 120 m² or 300 m³.  

TTK 122 E – special equipment features

TTK 122 E - front view
Adjustable hygrostat for constant monitoring of relative humidity. When exceeded, the device is automatically activated. As soon as the desired humidity value is reached, the compressor automatically switches off.
TTK 122 E – control panel/timer function
The control panel of the TTK 122 E is provided with a clear design and is easy to understand. In addition, the comfort dehumidifier comes with a 24h timer and auto restart function (memory function).
TTK 122 E – air filter/activated carbon filter
The easily removable air filter retains lint and animal hair and can be quickly and easily wiped or washed out. The additionally integrated activated carbon filter removes unpleasant odours from the air.
TTK 122 E – water tank
The removable water tank has a storage capacity of 8 litres. The device stops automatically when the condensation tank is full or not installed correctly and indicates this via a filling level warning light. In order to continuously drain the condensation water, a hose can be connected.
TTK 122 E – target value preselection
The TTK 122 E is provided with an automatic hygrostat-controlled dehumidification function. The desired humidity value can be set to target values between 30 and 90 % RH. When the value is exceeded, the device is automatically activated. When the desired humidity level is reached, the compressor switches off automatically.
TTK 122 E – automatic defrosting
The TTK 122 E comes with a function for automatic defrosting. At room temperatures below 12 °C, the evaporator will freeze during dehumidification. Hot gas defrosting starting at an evaporator temperature of 1 °C ensures short defrosting times and faster drying results.
TTK 122 E – laundry drying function
The TTK 122 E 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 on the clothes from condensing in the room and from becoming a hotbed for mould.
TTK 122 E – permanent mode
In the permanent mode, the TTK 122 E 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 122 E – fitness studio
Whether at home, in the office or in the bedroom – with its automatic control of the entered air humidity value, indication of the relative humidity level, its laundry drying and timer function, the dehumidifier TTK 122 E provides for a perfect indoor climate at all times.
TTK 122 E – water damage
The TTK 122 E is also an excellent choice when it comes to its use for water damage restoration. The process of drying the spaces can be substantially accelerated in such cases of damage, as a consequence considerably reducing mould formation. A connectable air hose also makes it possible to dry hollows.
TTK 122 E – construction shell
Shells can be dried perfectly and easily in no time with the powerful and comfortable dehumidifier TTK 122 E. This prevents major delays caused by necessary drying processes in the construction project, even at low temperatures.
TTK 122 E – wine cellar
In order to prevent the formation of unwelcome mould that is dangerous to your health in garages, hobby rooms 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:

  • High-quality hot gas automatic defrosting
  • SuperDry function for an accelerated drying of textiles
  • Automatic hygrostat-controlled dehumidification operation with real-value humidity selection
  • Activated carbon filter against unpleasant odours
  • 24-hour timer
  • Auto restart function (Memory function)
  • Laundry drying function
  • Continuous mode
  • Easy-care material mix with distinctive looks
  • Digital display of current humidity and temperature values
  • Control panel lock function (child lock)
Click to enlarge in a new window

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 122 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.

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.

Comparison of comfort dehumidifiers TTK 120 E and TTK 122 E

Do you need dehumidification performance for slightly smaller rooms?

Discover the structurally identical TTK 120 E. The robust dehumidifier offers a dehumidification performance of up to 30 litres per day and is perfectly suited for larger rooms sized up to 95 m² or 238 m³.

Click here to find out more ...

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 TTK 122 E mit Heißgas-Abtausystem show in Trotec online shop

Luftentfeuchter TTK 122 E mit Heißgas-Abtausystem

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848.99 € 799.99 € incl. VAT Show net price (VAT not included)


Technical data

Technical data
General information
  Article number
Dehumidification performance
  At 30 °C / 80 % RH [l/24h] 38
  Max. [l/24h] 40
Air flow rate
  Level Max. [m³/h] 240
Recommended room size construction drying
Recommended room size dry keeping
Ambient conditions
  Min. temperature range [°C] 5
  Max. temperature range [°C] 35
  Min. humidity range [% RH] 30
  Max. humidity range [% RH] 90
Electrical values
  Mains connection 220 - 240 V, 50 Hz
  Nominal current consumption [A] 2.9
  Power input [kW] 0.75
  Recommended fusing [A] 10
  Required current starting phase [A]
Electric connection
  Connection plug CEE 7/7
  Cable length [m] 2
  Rotary piston compressor
  Reciprocating piston compressor
  Minimum room size [m²] 4
  refrigerant R290
  Amount of refrigerant [g] 96
  GWP factor 3
  CO2 equivalent 0.00029 t
  Pressure suction side [MPa] 1.2
  Pressure outlet side [MPa] 2.6
Water tank
  Contents in [l] 8
Sound values
  Distance 1 m [dB(A)] 52
  Length (packaging excluded) [mm] 453
  Width (packaging excluded) [mm] 310
  Height (packaging excluded) [mm] 635
  (packaging excluded) [kg] 27.5
Equipment, features and functions
Automatic defrost system
  Hot gas
Automatic dehumidification
  Non-stop dehumidification
  Electronic hygrostat
  stages 2
Condensate tank monitoring
  Container available
  Overflow protection with automatic switch-off
  Filling level warning light to indicate a full water tank
Room air filter
  Readily accessible
  Pre-filter Synthetic fibre
Timer function
  Switch-off time can be preselected
  Switch-on time preselectable
Functions and features
  Room temperature display
  Continuous operation
  Indication of the current room humidity level
  Display of the set humidity
  Automatic fault diagnosis system
  Laundry drying function
  Operating control lamp
  Child lock
  Memory function
  Fan rundown function
  Auto restart function
  Carry/transport handle(s)
  Plastic wheels
Condensate drain
  Hose connection possible
  Recommended hose size [mm] 8
  Condensate pump
  Hose included in the scope of delivery
Control panel
  LED display
Shelf life
Adjustable air discharge direction
  Swing function
Housing design

 standard equipment

 optionally available

 not available



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