... 4.Long life 5.Market:America,Asia,Euro,Mideast HD242 Gas Heater:ModelLength(mm)Width(mm)Height(mm)Weight (kg)ConsumptionHeat ... the best combustion mode ,which means that gas (natural gas, liquefied petroleum gas) and combustion-supporting gas (air) are mixed according to the ... ) ,fully meeting the national environmental standards and there is no need for direct exhaust fan. The user manualTable 1:The ...