The THERM 35 KDZ a wall-hung gas condensing boiler, expands the technically most advanced series of the PREMIUM Condens. The active combustion operation control, provided by state-of-the-art components and electronics, ensures economical energy consumption. The boilers have stainless exchanger with cooled front burner wall. The new type of the gas valve in combination with the burner provides a high level of modulation in the regulation ratio of 1:10, from the minimum output of 3.4 kW. A high user comfort is provided by the easy control together with a built-in equitherm regulation and the possibility of control using a superior room regulator.

Condensation body combines the exchanger with cooling front burner wall equipped with brand new generation type of burner BLUEJET®. The THERM 35 KDZ version includes an integrated three-way valve and allows, besides the supply water warming in an indirect heating water tank.


Recommended retail price: on request

eu_flagThe product THERM 35 KDZ 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
  • Exceptionally ecological operation – Class NOx 6
  • Condensing body with a brand of new type burner: BLUEJET®
  • Broad modulation range: from 3.4 kW to 37.0 kW
  • New design of a multiphase fan
  • Noise reduction at higher speed
  • Electrically modulated SGV gas valve
  • Modulated high-efficiency circulating pump
  • New control unit with auto-diagnostics
  • The electronic system receives feedback about the status of burning and performs optimisation of the program map
  • The product is designed for heating systems and for warming supply water in an external storage tank
VIDEO: The most efficient series of the premium boilers THERM 35
Technical data Unit THERM 35 KDZ
Class of seasonal energy efficiency of heating - A
Nominal thermal input power kW 35.0
Min. – max. thermal output for heating kW 3.4 - 37.0
Max. thermal output for DHW kW 34.0
Fuel - natural gas / propane
Gas consumption - natural gas m3/h 0.33 - 3.50
Gas consumption - propane m3/h 0.14 - 1.45
Min. – max. overpressure of heating system bar 0.8 - 3.0
Maximum input pressure of heating water °C 80
Boiler efficiency % 97 - 106
Volume of expansion unit l 7
Nominal supply voltage / frequency V/Hz 230/50~
Auxiliary electricity at rated heat input W 68.2
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 / 280
Weight of boiler kg 29
Order number - 10118