For more than 30 years, Atwood has created millions of Atwood water heaters for the boat and recreational vehicle market. The Atwood G10-2 94180 features a patented 'through-tube' combustion chamber, utilizing the pilot flame to help maintain water temperature rather than losing this heat energy into the atmosphere. The Atwood G10-2 can hold up to 10 gallons of water, and the recovery rate is 8.5 gallons per hour. The Atwood G10-2 runs on gas, while other Atwood models operate from an electric source. With the Atwood G10-2, hot water is available in no time; you'll save time, energy and money!