Modernized series THERM 28 CXE.AA of boilers can be used to heat civil and industrial structures with utility water flow heating. They are derived from the concept of existing THERM atmospheric boilers plus recent innovative elements. The boilers are constructed as consumer appliances with maximum efficiency and an emphasis on minimum emissions into the air and minimum energy requirements.

The water is heated by a secondary plate exchanger that is part of the boiler. The boiler unit includes an energy saving circulating pump so that the water flows through the heating system. The advantages of this method of heating water are the compact dimensions for small spaces and the low price of the device.


Recommended retail price: on request/

eu_flagThe product THERM 28 CXE.AA 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
  • Flow utility water heating in the secondary plate exchanger
  • Energy saving pump
  • Water cooled low-emission burner
  • Simple and intuitive control
  • Fluent boiler output regulation
  • Can be regulated according to the spatial or outdoor temperature (equitherm regulation)
  • High efficiency and low gas consumption
  • Can be controlled by a room thermostat or intelligent room regulator through OpenTherm+
  • As standard the boilers have a white cladding
Technical data Unit THERM 28 CXE.AA
Class of seasonal energy efficiency of heating - C
Energy efficiency class of water heating - B
Declared loading profile - XL
Nominal thermal input power kW 31.0
Min. – max. thermal output for heating kW 12.0 - 28.0
Fuel - natural gas / propane
Gas consumption - natural gas m3/h 1.40 - 3.25
Gas consumption - propane m3/h 0.50 - 1.20
Min. – max. overpressure of heating system bar 0.8 - 3.0
Maximum input pressure of heating water °C 80
Boiler efficiency % 92
Volume of expansion unit l 10
Nominal supply voltage / frequency V/Hz 230/50~
Auxiliary electricity at rated heat input W 65
Level of coverage of electrical part - IP 44
Diameter of smoke flue mm 130
Dimensions: height / width / depth mm 830 / 500 / 367
Weight of boiler kg 40
Order number - 1044.9