The OPTIMUM Condens boiler series provides an optimal price/performance ratio. The THERM 14 condensing boiler series is made of attested components. The condensing body with stainless exchanger provides long service life and the top burner high efficiency and ecological operation. The shape and dimensions of the exchanger tube head limit the settlement of scale and sedimentation. Naturally, the boilers have the option of equithermic regulation, silent operation, and the flat dwellers will appreciate their compact dimensions.

For central heating, the boiler has a heat output from 3.2 kW to 14.8 kW. For household water heating, the maximum heat output of 14.2 kW is reserved. The boiler has an integrated three-way valve, allowing for comfortable heating of household water in an indirect heating reservoir.


Recommended retail price: on request

eu_flagThe product THERM 14 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 product is designed for heating systems and for heating household water in an external storage tank
  • The built-in three-way valve has the option to heat the water in an external storage tank
  • Energy saving pump with electronic control
  • Micro processor automatic control system
  • Stainless condensing exchanger
  • Fluent regulation of boiler output
  • Option of regulation according to the spatial or outdoor temperature (equithermic regulation)
  • High efficiency up to 107% with the use of the principle of condensing water steam from burnt gases
  • Boiler communication via OpenTherm+ protocol
  • Display of parameters via LCD display
  • Suitable combination with the floor heating system
  • Reliability and long service life
Technical data Unit THERM 14 KDZN
Class of seasonal energy efficiency of heating - A
Nominal thermal input power kW 14.7
Min. – max. thermal output for heating kW 3.2 - 14.8
Max. thermal output for DHW kW 14.2
Fuel - natural gas / propane
Gas consumption - natural gas m3/h 0.31 - 1.52
Gas consumption - propane m3/h 0.12 - 0.60
Min. – max. overpressure of heating system bar 0.8 - 3.0
Maximum input pressure of heating water °C 80
Boiler efficiency % 99 - 107
Volume of expansion unit l 7
Nominal supply voltage / frequency V/Hz 230/50~
Auxiliary electricity at rated heat input W 70.0
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 / 430 / 285
Weight of boiler kg 33
Order number - 10102