The air inside a typical home isn’t as clean as the air outside it. Dust, pet dander, cooking byproducts, humidity and whatever your building materials release all accumulate in a space designed to keep outdoor air out.
These guides cover what’s actually in your indoor air, what your existing HVAC filter does and doesn’t catch, and which additional measures are worth the money. We look at the evidence rather than manufacturer claims, and we’re clear about the difference between problems worth solving and problems worth ignoring.
Indoor air quality gets discussed mostly by companies selling something to fix it. That makes it hard to tell which problems are real, which solutions work, and which are expensive answers to questions nobody asked. Here’s the short version: the biggest improvements in most homes come from ventilation, humidity control and filtration, roughly in that…