What’s the Pressure Drop on a 21.5x26x1 MERV 13 Filter?
Most homeowners who track down a 21.5x26x1 MERV 13 filter ask about allergen capture first. The pressure drop question usually comes later, often after the first unexpectedly high energy bill. In our hands-on testing, we’ve measured pressure drop on multiple MERV 13 filters installed in residential systems, and the numbers run counter to what most … Read more