The HG boiler is used for heating single-family houses and smaller public utilities. It is intended for heating water in a central heating system to a boiler outlet temperature not exceeding 90 ° C and working pressure of not more than 2.0 bar for open systems or closed system up to a boiler outlet temperature not exceeding 90 ° C and working pressure of not more than 2.5 bar.

HG boiler used two-stage combustion process - gasification of fuel and subsequent pyrolysis that is combustion of formed gases. Wood fuel is used as a primary fuel. Boiler heat exchanger is made of high quality attested boiler plate with 6-8 mm thickness, in form of two chambers located above each other - connecting function of combustion chamber and ash-pan. Grate is located between the chamber allowing ideal gasification of wood and easy removal of ash. HG boiler is equipped with exhaust fan that protects it against backflow of smoke to the boiler room. Boiler can be assembled in the closed system.

Standard equipment:

• HG 2PID controller,
• PID function,
• version to the closed system,
• exhaust fan,
• analog thermometer,
• upper cleaning door,
• BVTS thermostatic valve,
• exhaust fan,
• cooling coil,
• mechanical exchanger cleaning system.

Optional equipment (at extra charge):

• GSM module,
• DK LOGIC 100 controller

Elements of additional equipment should be reported when ordering the boiler due to the lack of possibility of subsequent installation.

HG 2 PID controller servicing buffer, 3 pumps, mixing valve and exhaust fan;

3 years warranty for heat exchanger tightness, 2 years for the remaining components and efficient operation of boiler;

Heat exchanger made of certified high-grade boiler steel;

High thermal efficiency reaching 90% due to increased heat recovery from flue gases;

Boiler adapted for installation in closed system;

System for mechanical cleaning of heat exchanger;

Two-stage combustion process - fuel gasification and pyrolysis;

Exhaust fan eliminating problem with chimney draught and stabilising operation of the boiler;

Ceramic catalysts stabilising combustion process;

* Maximum area of heated rooms estimated for unit heat demand q=100 W/m2

** minimum safe storage tank capacity calculated in accordance with PN-EN 303-5

*** height of the DEFRO HG boiler can be additionally adjusted using attached feet. The feet have a 38-50mm adjustment range.

**** in case of higher pressure, use a pressure reducer.