Power Venter Application Furnaces For Fuel Type LP Natural Gas For Appliance Type Boilers Furnaces Water Heaters Maximum Vent Pipe Diameter 5 in Minimum Vent Pipe Diameter 5 in Maximum Heater BTU Input for Gas Appliance 610 000 BtuH Maximum Heater BTU Input for Oil Appliance Not Applicable Inlet Diameter 5 in Outlet Diameter 5 in For Vent Pipe Diameter 5 in Compatible with Brand Tjernlund Replacement For Manufacturer Model Number HS1 HST-1 HSUL-1 Nameplate Voltage 115V AC