The THERM 20 LXZE.A 5 wall-hung gas boiler with built-in storage tank is suitable for heating and preparing domestic hot water in small and medium-sized flats with insufficient space for the combination of the boiler and the stand-alone tank. The boiler is suitable for placement in the interior. There is no need for further connections between the boiler and the tank, all form a single unit. Fluently regulation of the boiler output from 8.0 kW and the low emission burner guarantee both ecological and economical operation.

We have reduced energy consumption costs together with minimum emissions into the air. The boiler is available in two versions according to the type of fuel, i.e. natural gas or propane combustion. The boiler output can be adapted to the immediate heating loses in the area over 40-100% of the boiler output.


Recommended retail price: on request

eu_flagThe product THERM 20 LXZE.A 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
  • Wall boilers with a built-in reservoir
  • The boiler includes a 55 l (stainless) indirect heating reservoir
  • The boiler has a three-way valve for alternatively heating the heating system and the hot water storage tank
  • 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)
  • Great efficiency and low gas consumption
  • Can be combined with a floor heating system
  • Can be controlled by a room thermostat or intelligent room regulator through OpenTherm+
Technical data Unit THERM 20 LXZE.A 5
Class of seasonal energy efficiency of heating - C
Energy efficiency class of water heating - B
Declared loading profile - L
Nominal thermal input power kW 22,2
Min. – max. thermal output for heating kW 8,0 - 20,0
Fuel - natural gas / propane
Gas consumption - natural gas m3/h 0,90 - 2,30
Gas consumption - propane m3/h 0,34 - 0,85
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
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 65
Level of coverage of electrical part - IP 44
Diameter of smoke flue mm 120
Dimensions: height / width / depth mm 830 / 800 / 390
Weight of boiler kg 62
Order number - 1076.1