KST-20 Vento - Ventilation, dehumidification, cooling

 Climate control KST-20 Vento front view with display, buttons and connections

Climate control KST-20 VENTO

Automatic, controlled room ventilation, dehumidification and cooling with aH-Controlled technology*

* aH-Controlled: Dehumidification on the basis of the absolute humidity

Further information on this topic can be obtained here: aH-Controlled technology

How aH-Controlled works

Product description

The KST-20 Vento is a climate control with aH-Controlled technology for ventilation, dehumidification and cooling for all kinds of private, commercial and industrial rooms. With its three operating modes for ventilation, dehumidification and cooling, the climate control KST-20 Vento can be implemented flexibly in almost any residential, work and industrial area.


Product features

  • Power supply: 230 V AC
  • Protection class: IP 65
  • Dimensions (LxWxH): 160 x 90 x 50 mm
  • Housing: high-quality ASA + PC (UL 94 V-0) for heavy-duty use, flame-resistant and self-extinguishing


The new, compact KST-20 Vento is an advanced control unit for ventilation devices, which allows automatic and controlled dehumidification, ventilation and cooling of rooms.

Domestic ventilation DIN 1946-6

In living spaces, the unit is able to comply with DIN standard 1946-6 and distinguish between different ventilation stages in a controlled manner.

Temperature-dependent cooling

By simply adjusting the configuration parameters, the device becomes a temperature-dependent cooling control for factory and production halls, as well as for server rooms and many other sensitive electrical facilities.

Dehumidification based on the absolute humidity

In dehumidification mode, the KST-20 Vento climate control is ideal for mould prevention and structural protection while maintaining a comfortable feel-good climate. Moisture is removed from the room in a controlled and reliable manner, so that an optimum temperature-humidity ratio, based on absolute humidity, can be ensured automatically.

Close-up of the KST-20 Vento display and operating keys

The basic principle of ZILA climate controls is to compare the water vapour content of the indoor and outdoor air. The water vapour content is defined by the absolute humidity (=aH) and is a measure of the "actual" humidity in the air. Comparing the absolute humidity of the indoor and outdoor climate ensures that moist air is removed from rooms and only drier outdoor air is introduced. "aH Controlled" means that suitable times for ventilation are automatically determined by the ventilation and dehumidification control, considering the climatic conditions inside and outside a building. At the same time, the devices can control the most common fans with and without heat recovery, as well as motor-driven window openers, fully automatically. This technology not only maintains a healthy building structure and a comfortable indoor climate, but is also very energy-efficient, as ventilation is only carried out if necessary and an air exchange makes sense.

Comfort functions

In addition to the automatic operating modes for ventilation, dehumidification and cooling, the range of functions of the KST-20 Vento includes further comfort functions. With the integrated timer, pause and active times for the ventilation units can be set to the minute. A ventilation process can be started manually at any time using a button on the housing of the device. The "frost protection function" prevents the monitored room from cooling down too much, while the "dry protection function" ensures that the humidity in the room remains at a healthy level for both people and the building.

Measurements on the display of the KST-20 Vento

The various configurations and settings can be selected conveniently on the backlit display and the operating keys.

Technical specifications

Technical specifications

  • Measuring range humidity: 0…100 % rH,
  • Measuring accuracy humidity: ± 2%
  • Measuring range temperature: -40…+ 80 °C
  • Measuring accuracy temperature: ± 0.2 °C
  • Signal output: I2C

Connection options

      • Separate connections for supply and exhaust air elements up to 500 W max.
      • Alternatively, the following devices can be connected:
        • One-step fans
        • Two-step fans
        • Speed-controlled fans (0…10 V DC)
        • 230 V motor-driven window openers
        • 12 V ventilation flaps

Connection sockets of the climate sensors and actuators

From left to right: Power supply, actuator 1, actuator 2, indoor/outdoor climate sensor, indoor/outdoor climate sensor

Operating conditions

          • Temperature: 0…50 °C
          • Relative humidity: 85 % non-condensing
          • EMC / ESD: EN50082-1 / 2

Fields of application

          • Dehumidification of rooms and buildings, e.g. cellars, archives, museums, churches
          • Cooling of production halls and server rooms
          • Ventilation of living spaces, according to DIN 1946-6
          • Ventilation of meeting and conference rooms, classrooms, sports halls and gyms


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Dehumidification technology aH-Controlled briefly explained

Needs-based and user-independent cellar dehumidification with the KST-20 climate control

Energy-efficient room cooling with the KST-20 Vento

Prices and availability

For an individual offer for our climate control KST-20 Vento, please contact us by phone at
+49 (0) 3681 86-7300 , by email under This email address is being protected from spambots. You need JavaScript enabled to view it. or by using our contact form.
Our experienced sales team is looking forward to your enquiry!

Blog posts about the KST-20 Vento

Intelligent, decentralised climate control thanks to flexible actuator selection

Intelligent, decentralised climate control thanks to flexible actuator selection

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Energy-efficient cooling of electrical rooms with the climate control KST-20 Vento

Energy-efficient cooling of electrical rooms with the climate control KST-20 Vento

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KST-20 Vento - multifunctional climate control for intelligent room dehumidification, ventilation and cooling

KST-20 Vento - multifunctional climate control for intelligent room dehumidification, ventilation and cooling

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Quotation, price information and ordering

Many of our products can be adapted to their fields of application and use individually. Besides the individual factory-set parameters, such as the different measuring ranges, the surrounding media and electrical connections and accessories are also important aspects for the offer.
Therefore, let us advise you professionally and without any obligation!
Our experienced sales staff will be pleased to prepare a suitable offer for you quickly.

Your contact options

Business times:
Monday - Friday 8:00 - 17:00 (CET)


Phone: +49-6251-8462-0

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