The ProLine series Gas Water Heater is designed to deliver an economical performance that can lower your energy bill and also provide long lasting value. Featuring a 50 gal (nominal) tank and a 60000 Btu/hr gas burner, the GS6-50-XCT atmospheric vent deliver 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 certified. It carries a 10 years limited tank warranty and meet Low NOx emission requirement.