- 40,000 BTU input atmospheric vent design
- 78-gallon first hour rating
- 8-year limited tank and parts warranty
- Ultra-Low NOX Green Choice® Gas Burner, meets or exceeds emission requirements in California & Utah
- Push-button piezo ignitor makes lighting pilot fast & easy
- Patented Blue Diamond® glass tank lining protects against corrosion
- DynaClean™ automatic cleaning system protects against sediment build-up
- Stainless steel CoreGard™ anode rod protects against corrosion longer than ordinary anodes
The ProLine® Ultra-Low NOx gas water heater delivers an efficient, reliable performance and features an innovative design that protects against accidental ignition of flammable vapors. Featuring a 50-gallon (nominal) tank and a 40,000 BTU gas burner, the HUC-50 Atmospheric Vent delivers a first hour rating of 76 gallons. It carries an 8-year limited tank warranty and meets Ultra-Low NOx emission requirements. Environmentally-friendly insulation and factory-installed heat trap nipples reduce heat loss for maximum energy savings. This ProLine® water heater is designed with A. O. Smith's superior commercial-grade tank protection. Advanced tank features include stainless steel CoreGard™ anode rod, Blue Diamond® glass lining and DynaClean™ automatic sediment-cleaning system, all designed to help protect the tank from the corrosive effects of water and extend the life of the water heater. A. O. Smith’s ProLine® water heaters are residential products built to commercial-grade standards and are only available for purchase through professional wholesalers and contractors.
Residential Series Atmospheric Vent Lighting the Pilot
Residential Series Atmospheric Vent Draft Test
Residential Series Atmospheric Vent No Hot Water
Residential Series Atmospheric Vent Status Code 1 Flash
Residential Series Atmospheric Vent Status Code 2 Flash
Residential Series Atmospheric Vent Status Code 4 Flash
Residential Series Atmospheric Vent Status Code 5 Flash
Residential Series Atmospheric Vent Status Code 7 Flash
Residential Series Atmospheric Vent Status Code 8 Flash
Residential Series Atmospheric Vent Status Code Light Continuous