Looking for a furnace artical

[tshelters (Tom Shelters, CMI)]

I’am looking for an artical on why you should change your furnace filters, and what could happen if you don’t. Any links or sites out there?

[jjonas (Jeffrey Jonas)]

Not an article, but may give some info…

http://www.furnacecompare.com/faq/furnace_filter_faq.html