I've got a question for you. I live in a two story home
approximately 2400 Sq ft. with a bonus room above the garage. The
heating/cooling equipment is located in the attic. In two weeks, I'm
going to have the first and second stories split into separate HVAC
An additional issue I'm facing is the bonus room is either warmer or
cooler than the remainder of the house depending on the season. The
HVAC tech suggested adding a 12x12 return duct in the bonus room; in
addition to a previously existing duct in the upstairs hallway, to
help equalize the temperature. I read the return ducts should equal
the total size of the heating/cooling ducts in the rooms. So, if a
second duct were added in the bonus room, would the existing return
duct in the hallway need to be reduced accordingly?
Any information you can provide would be helpful. Secondary resources
would also be beneficial.