The suspension condensation boiler THERM 24 KDZN 5 finalizes the successful series of boilers THERM 24. The boiler is determined for heating system warming and supply water warming in built-in tank. The water warming is made in the same way as in case of combination of boiler and external tank but with the difference that in this case all is covered under the boiler shell. Thus the connection between the boiler and the tank is not necessary.

With the use of boiler with integrated tank you get a complete year-long supply of heat and warm water in the building. In addition it can be used anywhere where a technical room is missing and the boiler is situated in the interior of a flat or a house.

The boiler can use for heating its thermal output 4,9 - 20,7 kW. For the supply water warming the maximum thermal output up to 24,0 kW is reserved. The unit suits for energetically less demanding buildings, but its increased output for supply water warming ensures the highest warm comfort.


Recommended retail price: on request

eu_flagThe product THERM 24 KDZN 5 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 View the ErP label
  • The boiler includes a stainless tank of volume 55 litres
  • Energy-saving pump with electric control
  • Microprocessor control automat unit
  • Stainless condensation exchanger
  • Continuous output regulation
  • Option to adjust based on premises or outside temperature (equithermic regulation)
  • High effectiveness with the use of water vapour condensation of combustion gases
  • Communication of boiler with regulator using the system OpenTherm+
  • Display of parameters using LCD display
  • Suitable combination with floor heating systems
  • Reliability and long life service
Technical data Unit THERM 24 KDZN 5
Class of seasonal energy efficiency of heating - A
Energy efficiency class of water heating - A
Declared loading profile - XL
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 - 107
Volume of expansion unit l 7
Volume of the integrated tank l 55 (stainless)
Volume of expansion unit of DHW l 2
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 / 715 / 386
Weight of boiler kg 48
Order number - 1094