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.

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 integrated stainless storage tank with a capacity of 55 litres provides long service life and sufficient thermal comfort.


Recommended retail price: on request

eu_flagThe product THERM 14 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 product is designed for central heating and for heating household water in an integrated storage tank
  • The boiler includes a stainless storage tank with a capacity of 55 litres
  • 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 5
Class of seasonal energy efficiency of heating - A
Energy efficiency class of water heating - B
Declared loading profile - L
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
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 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 / 715 / 386
Weight of boiler kg 48
Order number - 10103