The ProLine® SL gas water heater is designed to handle both water heating and space heating in your home, while delivering optimized performance and exceptional reliability. Featuring a 50 gal (nominal) tank and a 60000 Btu gas burner, the GS6-50-XCTL Atmospheric Vent delivers a first hour rating of 99 gal and a recovery rate of 65 gph. With an 0.61 Uniform Energy Factor, this water heater is not Energy Star® qualified. It carries a 6-year limited tank warranty and meets Low NOx emission requirements.