The SW12DEL is one of the best RV water heaters on the road today! It uses a porcelain-lined steel tank and an anode rod to absorb electrolytical action, just like your water heater at home. Tanks are pressure tested twice during the manufacturing process to ensure their integrity. Capacity: 12 gallons. Ignition Type: Direct spark ignition. Wattage Rating: 1400 Watt. BTU Level: 12000 BTU. Depth: 22-1/4″. Width: 16-7/32″. Height: 16-7/32″. Does not include mounting hardware. Porcelain-lined steel tank Capacity: 12 gallons Ignition Type: Direct Spark Ignition Wattage Rating: 1400 Watt BTU Level: 12000 BTU