National Property Inspections - A common mistake on furnace filters is air flow direction. Arrow on this filter should be slanted down. Remember to Change it as needed every 1-3 months. Air
![Which Direction Does The Arrow Go When Installing an Air Filter? (How to Change Your Air Filter) - YouTube Which Direction Does The Arrow Go When Installing an Air Filter? (How to Change Your Air Filter) - YouTube](https://i.ytimg.com/vi/52RvZtrqtPI/hqdefault.jpg)
Which Direction Does The Arrow Go When Installing an Air Filter? (How to Change Your Air Filter) - YouTube
![Filterbuy 12x12x1 Air Filter MERV 13 Optimal Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 11.69 x 11.69 x 0.75 Inches) - Replacement Furnace Filters - Amazon.com Filterbuy 12x12x1 Air Filter MERV 13 Optimal Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 11.69 x 11.69 x 0.75 Inches) - Replacement Furnace Filters - Amazon.com](https://m.media-amazon.com/images/I/719CdObbcoL.jpg)