Installing a 4-inch furnace filter is a great example of why the way a filter is set up matters just as much as the filter itself. In many homes, a 1-inch filter is placed loosely in the ductwork with a small cutout, which often means it never seals properly. When that happens, air can bypass

Particulates — the dust, dander, pet hair, skin cells, and microscopic debris floating through your home — may seem harmless. But they have a direct impact on how you breathe, how often you get sick, and even how tired you feel throughout the day. In this article, we’ll break down why particulate matter is harmful