... Efficiency:82%; 3) Ceramic glass, SIT valve, firebox, burner, gas logs, black louver, blower; 4)N.T.:60kg Specifications:1 ... ) Efficiency: 82%;4) Fuel: Natural gas/LPG5) Ceramic glass, SIT valve, firebox, burner, gas logs, black louver, blower6) Yellow flames ... safety glass 4) Adjustable flame control 5) Louver 6) Vertical or horizontal termination 7) Limited lifetime warranty 8) Mounted switchOptional ...