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 40 gal (nominal) tank and a 40000 Btu/hr gas burner, the GS6-40-BCT atmospheric vent deliver a first hour rating of 80 gal and a recovery rate of 41 gph. With an 0.66 Uniform ENERGY FACTOR®, this water heater is not ENERGY STAR certified. It carries a 6 year limited tank warranty and meet Low NOx emission requirement.