... )Efficiency:82%; 2) SIT valve, firebox, burner, gas logs, black louver, blower G33 features: 1) 33'' ... : 82%4) Fuel: Natural gas/LPG5) High-temperature glass6) SIT valve, firebox, burner, gas logs, black louver, blower7) D- ... 82%4) Fuel: Natural gas/LPG5) High-temperature glass6) SIT valve, firebox, burner, gas logs, black louver, blower7) D ... FCL: 68pcsQty/40' FCL: 148pcs G33/G36 Gas Fireplace