Do you suffer from seasonal allergies? Do you have an issue with dust in your home? If you’re using a standard one inch fiberglass filter, you're doing no good for your allergies or your dust.
The fiberglass filters let almost everything through. The next step from fiberglass filter is using paper filters and if you have a one inch slot, you can put a one inch paper filter though there.
That will significantly increase the air filtration compared to a fiberglass filter but may collect enough debris that you find yourself changing them on a monthly basis. If you put in a large mechanical filter, a large, pleated paper filter, you can get cleaning that far exceeds a one inch paper filter and will last for six months to a year.
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