Induced Draft Blower Application Boilers Water Heaters For Fuel Type LP Natural Gas For Appliance Type Boilers Unit Heaters Water Heaters Maximum Vent Pipe Diameter 10 in Minimum Vent Pipe Diameter 8 in Maximum Heater BTU Input for Gas Appliance 700 000 BtuH Maximum Heater BTU Input for Oil Appliance Not Applicable Inlet Diameter 8 in Outlet Diameter 8 in Nameplate Voltage 115V AC Current 2.57 A Maximum Motor Speed 1 600 RPM