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Computherm Q20RF

Computherm Q20RF

VAT Included

Programmable digital room thermostat


The COMPUTHERM Q20RF type switched-mode programmable wireless (radio-frequency) digital room thermostat is suitable to regulate the overwhelming majority of boilers and air conditioners. It can be easily connected to any gas boiler having a two-wire thermostat connection point and to any air conditioning apparatus or electrical apparatus, regardless of whether they have a 24 V or 230 V control circuit. The device can be programmed as needed so that the heating/cooling or humidifying/dehumidifying system heats/cools or humidifies/dehumidifies your apartment or office to the desired temperature or humidity at the times you want, and it contributes to the reduction of energy costs in addition to providing comfort.

We recommend it for places where accurate temperature and humidity measurement and temperature and humidity setting, switching accuracy, high functionality, and programmable temperature and humidity-based control are important.

Important functions

  • Separate independent daily programs can be created for each day of the week
  • For each day, beside 1 fixed switching time, 10 freely adjustable switching times can be set, and a different temperature and humidity can be assigned to every switching time
  • Use of manual modes
  • Temporary manual mode: until the next program switching, for 1 to 99 hours and for 1 to 99 days
  • Selectable switching sensitivity
  • Possibility of temperature and humidity sensor calibration
  • Pump protection function
  • Easy switching between cooling, heating, humidification and dehumidification modes
  • Humidity limit for cooling: using this function, you can set the humidity level above which the thermostat will stop cooling to prevent condensation
  • Large display with backlight, adjustable brightness
  • Activable acoustic signal when buttons are touched

Technical data of the thermostat (transmitter):

  • Temperature measurement range: 0 to 48 °C (in 0.1 °C increments) / 32 to 100 °F (in 0.1 °F increments)
  • Humidity measurement range 0 to 99% RH (in 1.0% increments)
  • Adjustable temperature range: 5 to 45 °C (in 0.5 °C- increments) / 41 to 97 °F (in 0.5 °F increments)
  • Adjustable humidity range: 0 to 99% RH (in 1.0% increments)
  • Temperature measurement accuracy: ±0.5 °C / ±0.9 °F
  • Humidity measurement accuracy: ±3% RH
  • Temperature calibration range: ±3 °C (in 0.1 °C increments) / ±6 °F (in 0.1 °F increments)
  • Humidity calibration range: ±10% RH (in 1% increments)
  • Selectable switching sensitivity: ±0.1 °C - ±1.0 °C / ±0.2 °F - ±2.0 °F / ±1% - ±5% RH
  • Battery voltage: 2 x 1.5 V alkaline batteries (LR6 type; AA size)
  • Protection against environmental impacts: IP30
  • Operating frequency: 868.35 MHz
  • Transmission distance: approx. 50 m in open terrain

Technical data of the receiver unit:

  • Power supply voltage: 230 V AC, 50 Hz
  • Switchable voltage: max. 30 V DC / 250 V AC
  • Switchable current: 6 A (2 A inductive load)
  • Protection against environmental impacts: IP30
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