The Suburban Direct Spark Ignition Gas/Electric Water Heater is the perfect solution for your hot water needs. This 6 gallon model (SW6DE) is designed for maximum efficiency and comes with the following features: Direct spark ignition 6 gallon capacity with gas/electric operation The 1440-watt Incoloy electric element is specifically designed for compatibility with campground power Benefit from a high recovery rate of 12,000 BTU/hour The porcelain steel tank features foam insulation for enhanced efficiency Easy to install access door and frame, sold separately below, for convenient accessibility All part numbers 5239A , 5139A, and SW6DE correspond to the same water heater model SW=Suburban Water Heater, #=Gallon Tank, D=DSI, E=110V Electric, L=Relay, M=Heat Exchange, P=Pilot