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 ...

A small-duct high-velocity system was used in this Johns Island, SC house. The ducts vents can hardly be seen. The house was designed by Architect Sam Rashkin. Energy Star estimates that 20% to 30% of ...

How often has an AHU or system been reused as part of a building renovation project and/or to expand the area served by the associated unit to provide additional air conditioning or heating? It ...

HVAC ductwork: Set it and forget it, right? Wrong, say growing numbers of technicians and HVAC educators who emphasize that calculated, deliberate ductwork design and construction are major factors in ...

Poor heating of rooms in homes equipped with warm-air furnaces can sometimes be traced to heat loss through uninsulated or poorly sealed air ducts. When ducts run through cold areas such as crawl ...