Environment-friendly wood pellet stove constructed from thick sheet-steel with heat resistant paint. The steel firebox with cast-iron burn pot is equipped with a “flame distributorcatalyzer” in Keramfire®, which allows a cleaner and brighter combustion (device and functioning system protected under patent). The 750°C thermal shock resistant ceramic glass door makes the firebox totally air-tight. The zincplated steel fuel hopper has a 55 kg capacity. The electronic card with microprocessor switches on and shuts off the stove, feeds pellets, draws the exhaust gases, operates the water circulating pump and detects problems. The stove is supplied complete with control module with time-and-heat regulator for shortand long-term programming. Flueing is to the rear. The unit is to be installed in a hydraulic circuit with closed expansion tank.