Homeowners know when a duct problem arises. They know when a room is too warm or too cold. But they might misdiagnose the cause. “They are under the assumption that when they get a new a/c system, ...

Q. This week: Is there any way to reline or replace metal heat ducts under a concrete slab floor without tearing up the floor? We had our ducts commercially cleaned five years ago, when we were having ...

The Technician's Guide equips practitioners with the knowledge to properly implement all of the measurement procedures required in the HVAC QI Specification. This Guide & Workbook is intended to ...

Compare plans tailored to your home & budget. If your home has mold or vermin or the ducts are particularly clogged with dust, then cleaning them may be a good idea to freshen up your home’s air.

Q: I had a heating-and-air-conditioning professional come to my home and do a home-energy analysis. He says my ductwork needs to be repaired upstairs and in the crawlspace, because a good deal of ...