Filter for Atwood furnace
I am considering putting a lightweight foam or fiberglass filter behind the intake grill on my Atwood 8531 furnace. The opening is 10 x 24". Comments
Forum Discussion
Really it's not necessary to filter any of the furnace air. The reason why you need a filter on the AC is the protect the evaporator coil. The evaporator coil consists of tubes surrounded by very closely spaced fins. Dirt and dust can quickly plug up the coils. This will eventually lead to a reduced air flow and icing issues.
The furnace on the other hand doesn't have a tightly packed coil like the AC. The heat from the propane flame blows into large burner chambers. The blower then blows the interior air over these chambers which pick up the heat. There's not a whole lot of places where dust can get trapped and build up. Most of it just blows back out through the ducts. The only real area of concern is in the fan housing. Over time dust can accumulate between the fan and the housing. Just vacuum out the housing after several years and you'll be good to go.
The furnace on the other hand doesn't have a tightly packed coil like the AC. The heat from the propane flame blows into large burner chambers. The blower then blows the interior air over these chambers which pick up the heat. There's not a whole lot of places where dust can get trapped and build up. Most of it just blows back out through the ducts. The only real area of concern is in the fan housing. Over time dust can accumulate between the fan and the housing. Just vacuum out the housing after several years and you'll be good to go.
