Would it be a bad idea to use two air filters


The filter in our central air/heat is directly under the unit and very difficult to replace filters. Even though we use 3 month filters, we replace them monthly due to pet hair/dander. It's a pain to replace them and pretty costly to replace them so frequently.

I was wondering if it would restrict air flow too much if I were to use cheap fiber filters in the return air vent to catch the big stuff and the better pleated filter in the unit for the fine stuff so I don't have to replace the more expensive ones as often?

Best Answer

In my area most duct systems are too restrictive as it is. Adding an extra filter would make them more so unless the other filter was removed and the new one was less restrictive. Problems could include AC icing and furnace overheating. As always you can try it and see.