Understanding 20x25x4 Air Filters: How Filter Thickness Influences HVAC Airflow and Filtration Performance
Why HVAC Filter Thickness Matters for System Performance Most homeowners I talk to have never thought twice about their filter’s thickness. They grab whatever fits, slide it in, and forget about it for three months. I get it — it seems like a minor detail. But after auditing dozens of residential HVAC systems, I’ve learned … Read more