Our new THERM 24 KDZN boiler is for a heating system and heating water in an indirect external heating reservoir. The water is heated by a built-in three-way valve that is part of the boiler. The advantage of this method of heating water is a fast and convenient supply of hot water.

The boiler has heating power of 4.9 to 20.7 kW for the heating. Heating power of up to 24.0 kW is reserved for heating utility water. The boiler can provide the maximum convenience in supplying hot water.


Recommended retail price: on request

eu_flagThe product THERM 24 KDZN 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
  • The built-in three-way valve can be used to heat water in external storage tank
  • Energy saving pump
  • Micro processor automatic control system
  • Stainless condensing body
  • Fluent output regulation
  • Can be regulated according to the spatial or outdoor temperature (equitherm regulation)
  • High 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 KDZN
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
Max. thermal output for DHW kW 24.0
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 % 98 - 105
Volume of expansion unit l 7
Nominal supply voltage / frequency V/Hz 230/50~
Auxiliary electricity at rated heat input W 74.5
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 33
Order number - 1092