Delivers hot water in less than 30 minutes! All you have to do is light the pilot light when your reach your destination and hot water is available in less than one half hour. Atwood six gallon water heaters are 14 pounds lighter than competitive brands. Features include a high temperature limit switch, thermostat and pressure and temperature relief valve that prevent problems before they happen. 10,000 BTUs. Cut-out size: 16 in.W x 15-1/2 in.H x 20-3/4 in.D. Durable, powder-coated access doors are included. 1/box.