Does travel trailer furnace have a filter?

[plasticmaster]

The ac unit in my travel trailer has a filter that I clean periodically. Does my furnace have a filter? I've never opened the compartment that houses the furnace.

[jeeperman]

I put a window screen on the back side of the intake grate to keep some dog hair from entering. It has worked very well with very little air flow restriction. No problems

[kellem]

No filters.
It's the reason I gotta clean my sail switch periodically because I got dogs that shed. ??

[Caveman_Charlie]

I've never seen one that did. But, I'm used to older units. Maybe some of the new ones have one ???

[wildtoad]

No. Filters would obstruct the air flow and cause overheating.

[Bobbo]

The AC has coils and fins that can get obstructed by dust and dirt floating in the air. The furnace does not have coils and fins to get obstructed.

[ktmrfs]

highly unlikely. I've yet to see a RV furnace with a filter. They may exist, but if so are pretty rare.