Power Venter Application Oil Heating For Fuel Type LP Natural Gas Oil For Appliance Type Boilers Furnaces Water Heaters Maximum Vent Pipe Diameter 4 in Maximum Heater BTU Input for Gas Appliance 180 000 BtuH Maximum Heater BTU Input for Oil Appliance 168 000 BtuH Inlet Diameter 4 in Outlet Diameter 4 in Nameplate Voltage 115V AC Current 2.3 A