Dometic 38355 Furnace; DFL Series; Model DFLD40121; LP Gas; 40000 BTU; Single Stage; Bottom Discharge; Large Size; 12 Volt DC; 16-1/2 Inch Width x 9 Inch Height x 20 Inch Depth; Thermostat Sold Separately; Without Access Door; Existing Cut Out Should Be Measured To Ensure The New Dimensions Will Fit. Attributes BTU Level: 40000 BTU Discharge Type: Bottom Type: LP Gas Stage: Single Width: 16-1/2 Inch Height: 9 Inch Depth: 20 Inch With Vent Assembly: No With Access Door: No Marine: Yes   Product Description The Dometic 40,000 BTU Large Furnace boasts a quiet operation due to reduced air turbulence. For easy and flexible installation, it may be placed vertically or horizontally. Features & Benefits Reduced Air Turbulence Low-Profile, Compact Design Quiet Operation Horizontal Or Vertical Configuration For Flexible Installation Limited 2 Year Warranty