1)Efficiency:82%; 2) SIT valve, firebox, burner, gas logs, black louver, blower G33 features: 1) 33'' small ... ) Fuel: Natural gas/LPG5) High-temperature glass6) SIT valve, firebox, burner, gas logs, black louver, blower7) D-Vent8) Weight: 55.5kg9 ... ) Fuel: Natural gas/LPG5) High-temperature glass6) SIT valve, firebox, burner, gas logs, black louver, blower7) D-Vent8) Weight: 60kg9) Size ...