AC Filter Airflow Arrow Direction: Which Way Does It Face and Why?
If you have ever stopped mid-install and questioned which way the AC filter airflow arrow should face, that hesitation is justified. Based on hands-on HVAC inspections and airflow diagnostics documented at HVACGuidePost.com, incorrect filter orientation is one of the most common—and most overlooked—causes of restricted airflow and premature system strain. This guide goes beyond generic … Read more