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.

But what workers hate is not the air-conditioning itself. It’s the way that air-conditioning is distributed: through snaking overhead tunnels of metal ductwork and out the end of just a few vents ...