Boilers of the THERM 24 KDN type are designed only for heating the heating system. They are suitable everywhere where is water heating resolved in another way, for example by means of an electrical storage tanks. Compact dimensions of the boiler unit allow for trouble-free installation in the interior and thanks to the low noise of the device you will not be disturbed. Modern components, advanced regulation including equitherm regulation and simple operation, deliver high efficiency and environmental performance.

Additionally can be boilers THERM 24 KDN supplemented by heating the water in external tank with using an external three-way valve. For heating has the boiler a heating power in the range of 4.9 - 20.7 kW.


Recommended retail price: on request

eu_flagThe product THERM 24 KDN complies all legislative, safety, healthy and environmental requirements of the European Union and CE mark enables the free movement of products within the market of the European Economic Area.

Emission category NOx 6 View the ErP label
  • Energy saving pump with electronic control
  • Micro processor automatic control system
  • Stainless condensing body
  • Fluent output regulation from 4.9 kW
  • There is also the option to heat water in an external reservoir and to fit with a three-way valve
  • Can be regulated according to the spatial or outdoor temperature (equitherm regulation)
  • Great efficiency using the water steam condensing principle from burnt gases
  • Boiler communication through OpenTherm+ protocol
  • LCD parameters display
  • Can be combined with a floor heating system
  • Reliability and long service life
Technical data Unit THERM 24 KDN
Class of seasonal energy efficiency of heating - A
Nominal thermal input power kW 20.6
Min. – max. thermal output for heating kW 4.9 - 20.7
Fuel - natural gas / propane
Gas consumption - natural gas m3/h 0.48 - 2.04
Gas consumption - propane m3/h 0.20 - 0.80
Min. – max. overpressure of heating system bar 0.8 - 3.0
Maximum input pressure of heating water °C 80
Boiler efficiency % 99 - 107
Volume of expansion unit l 7
Nominal supply voltage / frequency V/Hz 230/50~
Auxiliary electricity at rated heat input W 66.0
Level of coverage of electrical part - IP 41 (D)
Diameter of smoke flue mm 60/100, 80/125, 2x80
Dimensions: height / width / depth mm 725 / 430 / 285
Weight of boiler kg 32
Order number - 1093