Cabin Air Filter/ Sound Deadening

[PeteK]

2018 Winnebago Vista LX 35F.
Is there a cabin air filter under the folding table area? It looks like there may be one used with the engine AC. If yes, how is it accessed?

Also, I sound proofed under the dog house and noticed that there is very little sound proofing under the passenger and driver's side floor. I am contemplating using a 1/2" rubber matting on the floor on each side to help dampening the engine sound. This matting will be cut to size to fit the floor profile and can be removed if necessary (no glue but some double faced tape).

Thanks for your help and advice.
Peter K

[Morich]

We have a 2015 Vista 31 ke and recently wanted to find/fix a problem with the relay for radio power bad enough to pull the screws holding the plastic cowl to the rest of the dash. Amazing find under there as looking down from above, after removing the plastic, I could see the ground!
On ours, there is a space between two sections of metal bracing/ support where one could drop a pencil down to the ground!
So if one is inclined to cut both ground noise as well as hot or cold air blowing in under the dash, taking that plastic off and squirting a line of expanding foam in that crack might do a lot for things!
Pictures to show where we have a gap to fill. Those are eight inch tie wraps stuck in the crack to show it is open to under the cowl.
No guarantee you have the same but it might be a good bet??

Also another forum user, Wyatt, pulled the engine cover and added sound deadening under it. He has a forum post on here somewhere.