![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?auto=webp&s=aa504b27093de7e026c0e9d0fe6fe98f5fe95d56)
What would I call this filter material for my old gas furnace and where might I find more? Any tips/tricks? : r/HVAC
![hvac - Where should my furnace filter go in a Lennox G40UHX series furnace? - Home Improvement Stack Exchange hvac - Where should my furnace filter go in a Lennox G40UHX series furnace? - Home Improvement Stack Exchange](https://i.stack.imgur.com/SWrpL.jpg)
hvac - Where should my furnace filter go in a Lennox G40UHX series furnace? - Home Improvement Stack Exchange
![Think Crucial Replacement 16 in. x 25 in. x 3 in. Lennox Furnace Filters Fits X0581 and BMAC-12C (2-Pack) 701980788765 - The Home Depot Think Crucial Replacement 16 in. x 25 in. x 3 in. Lennox Furnace Filters Fits X0581 and BMAC-12C (2-Pack) 701980788765 - The Home Depot](https://images.thdstatic.com/productImages/1b9459af-a166-406c-ae5e-665092541d7c/svn/think-crucial-air-filters-accessories-701980788765-64_600.jpg)
Think Crucial Replacement 16 in. x 25 in. x 3 in. Lennox Furnace Filters Fits X0581 and BMAC-12C (2-Pack) 701980788765 - The Home Depot
![Think Crucial Replacement 20 in. x 25 in. x 5 in. Lennox Furnace Filters Fits 8171433K, 83377, 8171433 (2-Pack) 701980788734 - The Home Depot Think Crucial Replacement 20 in. x 25 in. x 5 in. Lennox Furnace Filters Fits 8171433K, 83377, 8171433 (2-Pack) 701980788734 - The Home Depot](https://images.thdstatic.com/productImages/bb824b38-04fa-4ae0-9f9a-8250e9d70bf8/svn/think-crucial-air-filters-accessories-701980788734-64_600.jpg)
Think Crucial Replacement 20 in. x 25 in. x 5 in. Lennox Furnace Filters Fits 8171433K, 83377, 8171433 (2-Pack) 701980788734 - The Home Depot
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DIY. Lennox model G12 & G12E Furnace/AC filter change. Hammack filter, B... | Ac filters, Change, Diy
![Lennox X6672 Furnace Filters, Carbon Clean Healthy Climate 16x25x5 Air Filter Replacement Merv 16 Filter Media with Homequip Disposal Bag (2 Pack) - Walmart.com Lennox X6672 Furnace Filters, Carbon Clean Healthy Climate 16x25x5 Air Filter Replacement Merv 16 Filter Media with Homequip Disposal Bag (2 Pack) - Walmart.com](https://i5.walmartimages.com/asr/c3743cbe-d615-446e-acac-263fabe2b2a6.c0962a0a7646720611adec4c56324dfb.jpeg)
Lennox X6672 Furnace Filters, Carbon Clean Healthy Climate 16x25x5 Air Filter Replacement Merv 16 Filter Media with Homequip Disposal Bag (2 Pack) - Walmart.com
![Tier1 Pleated Air Filter - 20x25x5 - MERV 11 Rated - Replacement for Lennox Air Conditioner/Furnace - Reduces Harmful Airborne Particles for Improved Air Quality - 2 Pack - Walmart.com Tier1 Pleated Air Filter - 20x25x5 - MERV 11 Rated - Replacement for Lennox Air Conditioner/Furnace - Reduces Harmful Airborne Particles for Improved Air Quality - 2 Pack - Walmart.com](https://i5.walmartimages.com/asr/bc41eb28-f2c0-4b51-b918-fcd16cdb8d98_1.5118c3ae3c38d82ed4d160522dc4ba57.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)