What Does the “2” Mean in a 25x29x2 Air Filter Size?
The “2” in a 25x29x2 air filter is its thickness in inches — and it’s the one dimension most homeowners overlook. At HVACScope.com, our hands-on testing across Florida homes has shown that even a half-inch difference in filter depth can restrict airflow, spike energy costs, and put unnecessary strain on your system. Below, we’ll explain … Read more