The ProLine standard electric water heater is a reliable 40 gal water heater choice when you are looking to maximize your hot water output and is designed with environmentally-friendly insulation to reduce standby heat loss. With a 30 gal (nominal) tank producing 6000 W, the ESX-30-DONT delivers a first hour rating of 48 gal and a recovery rate of 21 gph. With an 0.89 Uniform Energy Factor, this water heater is not ENERGY STAR qualified. It carries a 10-year limited tank warranty.