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Do some forced hot air heating systems have a permanent filter rather than one requiring periodic replacement?

If so, what maintenance, if any, do these require?

Public Comments

1. Some do, they just need to be rinsed and cleaned on a regular basis, you can also buy permanent furnace filters and electrostatic air filters, you can try a web search for permanent furnace filters.
2. You just clean out the captured dirt and reinstall it. I had one for a while and while it was fairly easy to clean, it restricted the air flow somewhat because it was made of more substantial material than the throw away kind. I set it aside and went back to the throwaways.
3. They have a filter that needs to be changes so you can filter out the dust in the air....it should be changed every 6 month for good working order... good luck
4. There used to be a washable type with aluminum fill. It was never good as the one now in the market. Buy the one at about 80 cent a piece. It is worth-ed.