Gas Heater Vent System, Application Furnaces, For Fuel Type LP, Natural Gas, For Appliance Type Boilers, Commercial Water Heaters, Gas Furnaces, Pool Heaters, Unit Heaters, Maximum Vent Pipe Diameter 4 in, Maximum Heater BTU Input for Gas Appliance 120,000 BtuH, Maximum Heater BTU Input for Oil Appliance Not Applicable, Inlet Diameter 4 in, Outlet Diameter 4 in, Compatible with Brand Tjernlund, Nameplate Voltage 115V AC, Current 1.26 A