Beyond the typical HVAC service checks for your customers, you might need to tackle issues with sub-slab HVAC ducts. In contrast to in-slab ductwork built into a concrete floor, sub-slab ductwork is ...

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 ...

Q: I just discovered that the air ducts in my concrete slab have problems. An odor alerted me to standing water, debris and even a dead animal in the ducts below my floor. I have galvanized air ducts ...

QDEAR BARRY: My home has a forced-air heating system, with ducts installed beneath the concrete slab floor. When it rains for several days in a row, the vents get wet, and some have standing water in ...

SINGAPORE - The dislodging of a ventilation duct from the ceiling of a cinema hall at Nex shopping mall on Sunday (Aug 30) was possibly a result of weakening duct supports, such as loose nuts and ...