Anyone who has attempted to measure the pressure drop of a filter mounted in a filter grille will admit it’s a challenge. Some installations have a significant amount of return duct between the filter ...

People whose homes are near busy highways may be able to reduce their blood pressure by running an air purifier with a HEPA filter, a study found. Just a month of air filter use cut systolic blood ...

For people living near busy highways, using air filters indoors results in short-term improvements to blood pressure, according to a new study I co-authored. Our team tested 77 participants over three ...

PRESSURE TAPS: Filter driers can be purchased with Schrader valves (pressure taps) on their inlets and outlets (left), or just on the inlet (right). A pressure drop of more than 2 psi measured with ...