Atwood 32715 DC Small Furnace 12,000 BTUThe new 12V Atwood Small Furnaces take the place of the previous 7900 series and are available in models from 12,000 - 18,000 BTU. Furnace Dimensions: 7" H x 12" W x 20" D. May be mounted vertically or horizontally. Access door and thermostat sold separately. 1/box. Note - The new Small furnace dimensions differ from the previous 7900 series, therefore please ensure that your RV will accommodate the new unit prior to ordering.Access Door and Thermostat sold separately.Tubular design residential style heat exchanger maximizes air distribution.More even air flow through the heat exchanger reduces hot and cold spots.Reduced air turbulence for a noticeably quieter operation.Increased cubic feet per minute of airflow exchanges air 10% faster, which heats the coach quicker.Weight savings affords less gas consumption and additional carrying capacity.The most duct configurations in the industry provides additional heating runs for maximum air distribution and floor plan flexibility.Vertical or horizontal mounting options on all series allow for increased flexibility in design.12,000 BTU