Unit Heater; Type Gas Fired, Separate Combustion, Low Static, Super High Efficiency; Voltage Rating 115 Volt AC at 60 Hertz; Current Rating 6.3 Amp (Full Load); Power Rating 657 Watt; Number of Phases 1; Capacity 131000 BTU/Hour (Input), 121830 BTU/Hour (Output); Heating Element 409 Stainless Steel Primary/Extruded Aluminum Macrochannel Secondary; Control Type Thermostat; Fan/Motor Type 1/4 HP (Open/Enclosed) 1050 RPM Motor, Vibration/Noise Isolated Fan; Air Flow Rate 2256 CFM; Color Glossy White; Size 39-3/16 Inch Width x 50-1/2 Inch Depth x 20-1/8 Inch Height; Mounting Ceiling Mount; Application Warehouse, Factory, Greenhouse, Commercial, Industrial, Gymnasium, Residential Garage, Retail; Approval ETL (Canada and US); Gas Type Natural, Liquid Propane; Gas Connection Size 1/2 Inch; Vent Connection Size 4 Inch; Fan Diameter 18 Inch; Thermal Efficiency 93 Percent; Air Temperature Rating 50 Deg F; Applicable Standard CQS