Atwood GC10A-2 GC10A2 LP Gas & Electric 10 Gallon RV Trailer Water Heater 94186 Ten gallon capacity. 10,000 BTU.  Atwood water heaters are designed so that more than 90% of the heat produced by the pilot light is utilized to maintain water temperature eliminating much energy waste. Atwood's heat transfer system with patented U-tube design delivers more hot water. Access to all the controls is as easy as opening the access door. All gas lines are connected in a sealed combustion area which is vented to the outside of the vehicle as a safety precaution. For use in RV's only. Dimensions: 15-3/4" x 16-1/4" x 20-5/8" (Cut-out) Dimensions: 15.5" x 16" x 20.8" (Actual) Note: New Door Included.