THERM 45 KD.A boilers are designed for heating buildings with a heat loss up to 45 kW. The fluently regulated output of 13 - 45 kW with the high efficiency of the combustion process and condensing brings maximum savings of gas in those buildings with high heating demands. Heating buildings with high heat loss can be advantageous when using cascade boilers. A three-way valve can be mounted underneath the boiler to resolve heating the water in indirectly heated storage tank.

The major advantage of THERM 45 KD.A boilers is the option to connect into cascade boiler rooms in houses and other industrial and residential buildings. This provides a highly economical and ecological solution for heating utility water in larger buildings. This intelligent system of condensing cascade boiler rooms is also adapted for older residential buildings, e.g. prefabricated buildings where due to its verified quality, it becomes one of the most effective forms of revitalization.


Recommended retail price: on request

eu_flagThe product THERM 45 KD.A 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 5 View the ErP label
  • Saving of operating costs after replacing an old boiler
  • Option to connect into a cascade boiler room in order to increase heating power
  • There is also the option to heat water in an external reservoir and to fit with a three-way valve
  • Fluent regulation of output 13.0 - 45.0 kW
  • Regulation option according to the spatial or outdoor temperature (equithermal regulation)
  • Use of new HDIMS 20-TH20 automatic control system
  • Strong ecological operation
  • Energy saving pump – savings on electric energy up to 50 %
Technical data Unit THERM 45 KD.A
Class of seasonal energy efficiency of heating - A
Nominal thermal input power kW 42.5
Min. – max. thermal output for heating kW 13.0 - 45.0
Fuel - natural gas
Gas consumption - natural gas m3/h 1.28 - 4.52
Min. – max. overpressure of heating system bar 0.8 - 3.0
Maximum input pressure of heating water °C 80
Boiler efficiency % 98 - 106
Volume of expansion unit l -
Nominal supply voltage / frequency V/Hz 230/50~
Auxiliary electricity at rated heat input W 198.4
Level of coverage of electrical part - IP 41 (D)
Diameter of smoke flue mm 80/125, 2x80
Dimensions: height / width / depth mm 800 / 430 / 370
Weight of boiler kg 45
Order number - 1065