To reduce allergens without shooting the pets, I'm installing a set of filters in my ductwork along with a new furnace. I want to do it in a way that does a good job, without a lot of expense in filter replacement.
I plan to put a cheap pre-filter ahead of a much better (and expensive) 4" pleated filter and then to the furnace. I have a HEPA filter that attaches to the side that cycles about a third of the air through it.
The advantage of this is that the first cheap 1" fiberglass filter catches the pet hair and other big chunks, extending the life of the 4", and the HEPA dealing only with air that has already run through a good filter...extending its life.
Only downside, is that the HEPA will see heated air...but I see no maximum operating temperature spec'd, and this system will not run very warm anyway.
All the filters are oversized, so they are not restrictive.
Am I missing something?
I plan to put a cheap pre-filter ahead of a much better (and expensive) 4" pleated filter and then to the furnace. I have a HEPA filter that attaches to the side that cycles about a third of the air through it.
The advantage of this is that the first cheap 1" fiberglass filter catches the pet hair and other big chunks, extending the life of the 4", and the HEPA dealing only with air that has already run through a good filter...extending its life.
Only downside, is that the HEPA will see heated air...but I see no maximum operating temperature spec'd, and this system will not run very warm anyway.
All the filters are oversized, so they are not restrictive.
Am I missing something?