Furnace Filter?

[bdickson]

Our Thor ACE has an Atwood furnace. Is there an air filter anywhere in the system? The owners manual is unhelpful, in fact it is just a generic manual covering all of Thor's Class C range (despite the fact that the ACE is a clas A).

[RV Wizard]

Most furnaces do not use a filter. I did however install one behind the return vent just to change the pitch of the fan motor in regards to background noise.

[bdickson]

Originally Posted by RV Wizard

Most furnaces do not use a filter. I did however install one behind the return vent just to change the pitch of the fan motor in regards to background noise.

Thanks Mike, that sounds like a good idea. Now if I can just figure out where the return vent is.

[Arch Hoagland]

I've never seen a furnace filter on an RV.

[Gary RVRoamer]

If the furnace is mounted in the basement and draws its return air through a hole in the floor, there is typically a filter there. I've seen them on American Coaches and some Winnebago diesels. But most RV furnaces do not have a air return filter, or the "filter" is a screen in the cabinet where the furnace is mounted. For example, if the furnace is under the fridge, there is usually a decorative fabric cover over the intake hole that suffices to keep dust out.