The airflow resistance a filter or fitting adds to the system.
The loss in static pressure across a component. For filters it rises with efficiency and falls with surface area, which is why a deep media cabinet can run a higher MERV at lower resistance than a one-inch filter. It also rises steeply as a filter loads — a filter left in too long can restrict airflow more than a new filter two grades higher would.
We work on pressure drop every week across DFW. CSIA-certified, written quotes, financing available.
Flat fee confirmed when you book. Same-week scheduling. A pass/fail verdict within 48 hours.
Water intrusion in the ducts, a musty smell that won't quit, or vermin in the system? We answer 7 AM to midnight and every visit ends with camera photos and a written verdict — including a straight "your ducts are fine" when that's what we find. After-hours dispatch runs subject to crew availability.
Emergency line