The Rheem Performance Platinum 40 Gal. Natural Gas Short Water Heater comes with a 40,000 BTU/hour environmentally friendly Low NOx burner that provides ample hot water for households with 2 to 4 people. The electronic ignition system eliminates the standing pilot light, saves energy and monitors system performance. Its maintenance free combustion air intake system means there are no filters to clean and replace. A premium grade anode rod provides long lasting tank protection. Factory installed temperature and pressure relief valve and 3/4 in. water connections are included with the water heater for easy installation. The water heater is ENERGY STAR qualified. This Rheem Performance Platinum model is Wi-Fi compatible allowing for remote monitoring of the water heater's operation (Wi-Fi Module REWRA631GWH sold separately).