ATLANTA — A new duct sizing calculator from ASHRAE and the Air Distribution Institute (ADI) allows HVAC air distribution system designers to more accurately size ducts, especially flex ducts under ...

ENGAGE THE CUSTOMER: Include homeowners in room airflow estimation and measurement to help them better understand the cause of their comfort problems. A measured airflow reading that’s half of what it ...

Dear Jim: We have central air conditioning, but have a problem keeping all the rooms evenly cool. Someone is always too hot or too cool. What are some simple methods to balance the temperatures ...

Main heating supply ducts need to get smaller the farther away they are from the furnace. Note how the large duct on the left narrows down. (Tim Carter) Analysis by Tim Carter Q: Tim, I’ve got a ...