Feeling a chill around the household? Heat up your living space with the Ashley Hearth Products 11,000 Btu Direct Vent Propane Wall Heater.This industry-leading wall furnace keeps your living or workspace warm with a direct vent wall heater that disperses pure, gentle heat in continuous circulation. The space-saving direct vent furnace design mounts to an exterior wall. When installing, wall thickness cannot be less than 4.5 inches and cannot exceed 10.00 inches. The gas flame with matchless Piezo lighting is completely sealed inside, away from all contact with room air.