The ProLine Series gas water heater is designed to deliver an economical performance that can lower your energy bills and also provide long-lasting value. Featuring a 50 gal (nominal) tank and a 50000 Btu gas burner, the GSX-50-RCT Atmospheric Vent delivers a first hour rating of 89 gal and a recovery rate of 58 gph. With an 0.61 Uniform Energy Factor, this water heater is not ENERGY STAR qualified. It carries a 10-year limited tank warranty, and meets Low NOx emission requirements.