Bag and Pocket Filters: Why the Windsock Shape Beats a Flat Panel
A pocket filter unfolds to roughly ten times the media area of a flat panel in the same housing. Here is what that buys you in service life, fan energy and running cost.
Buying Filter Media by the Roll: When It Is Smarter Than Buying Filters
Roll media wins on cost per square metre and odd sizes. Pre cut filters win on labour, frames and documentation. Here is how to work out which one your site actually needs.
Nominal vs Actual: How to Measure an Air Filter That Is Not a Standard Size
A filter sold as 20x20x1 is not actually 20 inches. Here is how to measure your housing properly, why a loose filter lets air bypass the media, and what to send a supplier.
What Is a G4 Filter? A Plain English Guide to Filter Grades (G4, F7, MERV and the Rest)
A G4 filter captures around 90 percent of dust by weight. Learn what that means, how G4 compares to MERV and ISO ePM10, and how to specify one in Australia.