![What would I call this filter material for my old gas furnace and where might I find more? Any tips/tricks? : r/HVAC What would I call this filter material for my old gas furnace and where might I find more? Any tips/tricks? : r/HVAC](https://preview.redd.it/b71mb1l04c231.jpg?width=640&crop=smart&auto=webp&s=7e17d7c5fe297eed577f6cd8d0df1a3706c1bc07)
What would I call this filter material for my old gas furnace and where might I find more? Any tips/tricks? : r/HVAC
![hvac - Very odd gas furnace installation in apartment... How do I change the filter? - Home Improvement Stack Exchange hvac - Very odd gas furnace installation in apartment... How do I change the filter? - Home Improvement Stack Exchange](https://i.stack.imgur.com/UusZE.jpg)
hvac - Very odd gas furnace installation in apartment... How do I change the filter? - Home Improvement Stack Exchange
![Weird air filters inside the furnace | Terry Love Plumbing Advice & Remodel DIY & Professional Forum Weird air filters inside the furnace | Terry Love Plumbing Advice & Remodel DIY & Professional Forum](https://terrylove.com/forums/proxy.php?image=https%3A%2F%2Fcimg9.ibsrv.net%2Fgimg%2Fwww.doityourselft.com-vbulletin%2F1500x2000%2Fairfilter1_cf9f14888944c741e4312d1fb28fe120b725b957.jpg&hash=bec2c855db98433e2808a44122a9c977)
Weird air filters inside the furnace | Terry Love Plumbing Advice & Remodel DIY & Professional Forum
![Weird air filters inside the furnace | Terry Love Plumbing Advice & Remodel DIY & Professional Forum Weird air filters inside the furnace | Terry Love Plumbing Advice & Remodel DIY & Professional Forum](https://terrylove.com/forums/proxy.php?image=https%3A%2F%2Fcimg8.ibsrv.net%2Fgimg%2Fwww.doityourselft.com-vbulletin%2F1500x2000%2Fairfilter2_3baa529b19ab52394a4b9f7313d02c3140860c5c.jpg&hash=8a15e05c8c41d08aa73f554b369d2add)