4-sectional  stainless steel condensing heat exchanger for condensation and utilization of latent heat of the water vapors from exhausting smoke with efficiency till 106%.

Fan burner with full gas-air premix provides gas combustion with close to ideal conditions-so the condensation process begins earlier and by higher return line temperature(about 57℃)

Electronic controlled fan with variable rotation speed for keeping the optimal minimal required air exceed in the gas-air mix

Modulation: boiler'output changes automatically to keep the set heating and DHW temperature constant, with great optimization of gas consumption

Indication of temperatures, working modes, current burner power and error codes on the color multifuctional LED-display

Automatic electronic ignition and ionization flame control

Integrated pump,expansion tank, heating safety calve, manometer, automatic air exhaust device

Automatic switch-off by: flame blackout, overheating over 90℃, too low DHW flow(<2.5L/min),combustion products exhaust failure, failure in electronic

Service menu for internal functions and working parameters adjusting

Frost protection: burner and pump will be switch on automatically by danger of freezing. it is allowed to use antifreeze liquid instead of water in the heating system

Supports outdoor temperature driven mode

Supports smooth control with open therm room thermostat from any producer

Stainless flue-air duct Φ60/100 1m length included.