![Friendly reminder to check your furnace filter. That cold spell probably had your furnace running a lot more than usual so what ever filter schedule you where on has been thrown off. : Friendly reminder to check your furnace filter. That cold spell probably had your furnace running a lot more than usual so what ever filter schedule you where on has been thrown off. :](https://i.redd.it/iltjt8e3esc41.jpg)
Friendly reminder to check your furnace filter. That cold spell probably had your furnace running a lot more than usual so what ever filter schedule you where on has been thrown off. :
What happens if air filter is backwards? By installing your filter backwards, air will have a harder time flowing through the filter and your air handler... | By Heatland.ca | Facebook
![Another image added to the free Gallery: Forced-Air Furnace Filter - Special Deals for InterNACHI Inspectors - InterNACHI®️ Forum Another image added to the free Gallery: Forced-Air Furnace Filter - Special Deals for InterNACHI Inspectors - InterNACHI®️ Forum](https://global.discourse-cdn.com/internachi/optimized/4X/f/4/a/f4aad4ff882769d9c652ae269a29a2ad167ae5ab_2_919x1024.jpeg)