Williams Comfort Products 5005622 Floor Furnace 50000 Btu

Product Description

The WILLIAMS COMFORT PRODUCTS 5005622 is a 50,000 BTU input natural gas floor furnace designed for residential spaces where a forced-air system is impractical or unwanted. It delivers 35,000 BTU of heat output with a thermal efficiency of 70 percent and an AFUE of 58 percent. The unit requires no electricity, operating on a standing pilot ignition and millivolt wall thermostat control, making it functional during power outages. A continuous-seam welded combustion chamber, jet-tube burners, and a heavy-duty baked enamel steel floor grille are standard. A licensed gas technician performs the install, and the unit is designed for straightforward field servicing with an accessible combustion chamber.

The 5005622 is suited for residential remodels, new construction, and space-constrained applications where a blower-driven system is not viable. It installs through the floor, requiring a floor opening of 22.5 inches wide by 32.5 inches long. The floor grille measures 24 inches by 34 inches and is compatible with hardwood, carpet, and tile surrounds. This model is factory configured for natural gas at elevations up to 2,000 feet above sea level. A separate liquid propane conversion kit (49210) is available. A high elevation kit (49800) is required for installations above 2,000 feet and is sold separately. A millivolt wall thermostat is required and sold separately.

Key Features

• 50,000 BTU input with 35,000 BTU heat output and 70 percent thermal efficiency
• No electricity required — standing pilot ignition maintains heat during power outages
• Continuous-seam welded combustion chamber for durability and leak resistance
• Inner jacket suspended on removable interlocking brackets for easy service access
• Jet-tube burners with convertible gas valves
• B-Vent flue system with 4-inch vent connection

Compatibility

The 5005622 is a natural gas floor furnace compatible with millivolt wall thermostats sold separately. Liquid propane conversion is available using kit 49210. High elevation installations above 2,000 feet above sea level require kit 49800, sold separately.

Installation Notes

Installation must be performed by a licensed gas technician in accordance with local codes and the applicable requirements of the International Fuel Gas Code (IFGC). Shut off the gas supply at the service valve before beginning any work on the unit. The B-Vent flue system must be properly sized and terminated per code; verify the 4-inch vent connection is compatible with the existing or planned venting arrangement. A millivolt wall thermostat is required and must be wired and located per the manufacturer instructions — it is not included with the unit.

Technical Specifications

• Heating Input: 50,000 BTU/h
• Heating Output: 35,000 BTU/h
• AFUE Efficiency: 58 percent
• Thermal Efficiency: 70 percent
• Fuel Type: Natural Gas
• Ignition Type: Standing Pilot
• Control Type: Millivolt Wall Thermostat (not included)
• Blower: Not available
• Venting Type: B-Vent
• Vent Connection Size: 4 inches
• Gas Connection Size: 0.5 inches
• Manifold Pressure: 4.0 inches w.c.
• Inlet Gas Pressure (Min.): 5.0 inches w.c.
• Inlet Gas Pressure (Max.): 7.0 inches w.c.
• Required Floor Opening: 22.5 inches wide x 32.5 inches long
• Floor Grille Size: 24 inches x 34 inches
• Floor Grille Material: Heavy-duty steel with baked enamel finish
• Center of Vent to Floor Clearance: 22 inches
• Side Wall Clearance: 8 inches
• Ground Level Clearance: 6 inches
• Installation Type: Floor
• Elevation Rating: Factory set for up to 2,000 feet above sea level

Standard Information

• Brand: WILLIAMS COMFORT PRODUCTS
• Manufacturer Part Number: 5005622