Furnace

Not a motorhome guy... but none of the RV's we have owned over the years had a furnace filter.

RV furnaces do not use a air filter.

RV gas furnaces move a lot of air because the heat exchanger is small and gets quite hot. For this reason, I believe, it has been taboo to restrict air flow over the heat exchanger, which a filter would do. Especially since most folks wouldn't keep it clean.

No furnace filter that I've ever seen or heard of on any RV furnace.

The air from the rv furnace is not recycled like a home furnace that goes through a filter.

Ava wrote:
The air from the rv furnace is not recycled like a home furnace that goes through a filter.

Actually the 'air' for furnace just like A/C Unit comes from within the RV so it is recycled.

Combustion air is pulled from outside and is exhausted back outside but the room air is recycled across heat exchanger

My American Eagle definitely has a furnace filter....however I think American Coaches are different from most manufacturers in this regard.

FWIW, on our rig it is located in a compartment beneath the Splendide Washer/Dryer.

FormerBoater wrote:
My American Eagle definitely has a furnace filter....however I think American Coaches are different from most manufacturers in this regard.

FWIW, on our rig it is located in a compartment beneath the Splendide Washer/Dryer.

Some RV Mfgs do have 'air filters' in return passages BUT neither Atwood or Suburban recommend them nor do they provide them for their furnaces.

RETURN AIR
The return air passage should be clean and clear of obstructions and meet the minimum square inches as specified in the installation instructions.
Make sure combustibles are not stored in the furnace compartment. Filters are not recommended at these air passages

Old-Biscuit wrote:

FormerBoater wrote:
My American Eagle definitely has a furnace filter....however I think American Coaches are different from most manufacturers in this regard.

FWIW, on our rig it is located in a compartment beneath the Splendide Washer/Dryer.

Some RV Mfgs do have 'air filters' in return passages BUT neither Atwood or Suburban recommend them nor do they provide them for their furnaces.

RETURN AIR
The return air passage should be clean and clear of obstructions and meet the minimum square inches as specified in the installation instructions.
Make sure combustibles are not stored in the furnace compartment. Filters are not recommended at these air passages

Take it up with American Coach.

Furnaces are Suburban and work very well with good warm air flow into the coach.