Your home is too hot in the spring and summer. Ehh. The first, most natural thought is that, obviously, there is something wrong with your air conditioner. Except, maybe not. It might be that your ...

Years of hands-on HVAC system analysis across Colorado show a clear pattern: indoor air problems rarely start in living spaces—they start inside the ductwork.

My husband seems to recall that you once wrote something about "fuzz" in the air inside a home. All of a sudden we're having a problem with some type of fuzz everywhere. It seems worse now that we're ...