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 ...

Q. Some rooms in our house are too hot or too cold and someone is always complaining. What can we do to even out the room temperatures to keep everyone happy. Will doing this lower our utility bills?

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 ...