RHGPRO4040F Features: -Natural gas professional series water heater. -Fury collection. -Tank capacity: 40 Gallons. -One-of-a-kind air/fuel shut-off device offers double protection. -Maintenance free. -Flammable vapor ignition resistant. -Low NOx design for low nitrous oxide emissions. -Everkleen patented system. -Reduces fuel costs. -Provides more hot water. -No matches required. -Includes brass drain valve. -Patented magnesium anode rod design ensures rust proof tank. -Includes temperature and pressure relief valve. -High altitude compliant. -ANSI standard. -National Appliance Energy Conservation Act (NAECA) certified. Specifications: -Manufacturer provides eight years limited tank and parts warranty. -Overall dimensions: 63.25'' H x 21'' W x 21'' D. For more information on this product please view the Sheet(s) below: Specifications Sheet