Empire Tahoe 48" Intermittent Pilot Control With On/Off Switch and Blower, Propane Gas Direct Vent Deluxe Fireplace h17 calculate the surface of the

calculate the surface of the lower floor

40” and 45” models

Model VOFBSD-36 Product Type Fireplace Door

Hard-wire ready

000 BTU heater/blower on and off

Empire Tahoe 48" Intermittent Pilot Control With On/Off Switch and Blower, Propane Gas Direct Vent Deluxe Fireplace h17 calculate the surface of theA Direct Vent system uses two vent pipes. One draws air in from outdoors to support combustion. The other exhausts the by products of combustion to the outside. The two vent pipes may be concentric (exhaust pipe within a larger diameter intake pipe) or co linear (separate pipes of about the same size). Combustion takes place inside a sealed chamber with a glass front in the case of a fireplace. Room air circulates around the combustion chamber, often