The ProLine Standard Electric water heater is the reliable 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 40-gallon tank delivering 4,500 watts, the HNS-40 delivers a first hour rating of 55 gallons at an Energy Factor of 0.95. The Coregard„ sacrificial anode helps protect the tank from the corrosive effects of water, and is accompanied by a 8-year limited tank warranty.Features:Commercial-Grade Heating Elements - Dual 4500 watt elements for faster recovery and reliable operation. Stainless steel upper and lower elements last longer than a standard copper element.DynaClean„ Diffuser Dip Tube - Helps reduce lime and sediment buildup, maximizes hot water output. Made from long lasting PEX cross-linked polymer.High Energy Factors - Eco-friendly non-CFC foam insulation, heat traps and other features combine to yield a higher Energy Factor that maximizes savings on operating costs.CoreGard„ Anode Rod - Our anode rods have a stainless steel core that extends the life of the anode rod allowing superior tank protection far longer than standard anode rods. ProLine Master products have increased anode protection with either longer, or multiple anodes depending on model.19 Minutes - Single Shower Length2.4 Showers back to back2.1 showers at the same time50 gallons maximum tub size7 minutes time to fill tubSpecifications: Intended Household: 3-4 PersonApplication: PlumbingCapacity (Gallons): 40Fuel Type: ElectricEnergy Factor: 0.95Energy Star Rated: NoVoltage: 240v1st Hour Delivery (Gallons): 55Warranty: 8 Years Limited Tank & PartsRecovery 90°F Rise: 21 GPHHeight (Inches): 49.75"Diameter (Inches): 20-1/2"Wattage: 4500