Ten gallon capacity. 10,000 BTU. 16"W X 15-1/2"H X 20.8" Overall. Gas and electric lockout. 3 try ignition. 2 amp automotive fuse. Circuit board is compatible with past gas powered water heaters. T-Stat and ECO located in front. No switches in rear of heater. Eliminates need for 120-volt remove switch. Electric element powered by 12-volt relay. Can be wired to low voltage monitor panel switches.