[hitchup]

Our Suite has gray foam filters that are washable and reusable in all the return air vents. We found a large one at WalMart and I cut them to fit for extras and to rotate while the others are drying.

I just cleaned all of five a couple of weeks ago. The one above our pantry was only slightly dirty as stated. I clean it once a year since it's so hard to get to.

We had a Mobile Tech clean and vacuum our furnace last year. It seemed to run smoother and quieter. Then he recaulked the top of the exterior door. He said it's important to keep the water from running inside.