... the oxidizing air and then the mixture is fired by ignition electrode, fully burning in the fire box and return. The heat ... out through the exhaust outlet.Features:1 . High speed of ignition < 12 S , noise of burning < 68dB ;2 . More reliable and ... pump , Thermal control , Solenoid valve , Control box , Big electric fan , Ignition , Glow plug , Sensor , etc . About us Our company supply other ...