I have a new home with a dual fuel, dual zone HVAC system, which supplies the main living level (zone 1) and a daylight basement (zone 2). They are seperated by a door at the top of the stairs. When the unit is supplying the main level, we have to leave the door open at least four or five inches, or it gets sucked closed with a bang! The air handler is using the basement returns to feed the air requirements.
I spoke to two seperate heating/cooling guys (from the same shop who installed the system) and both said that this is normal, that the air from both floors needs to mix. This makes sense I guess if I wanted to keep both floors conditioned, but the basement tends to stay at a comfortable temp, and we're down there rarely anyway. Seems to me this is an imbalanced system design. Am I correct, or am I the one imbalanced? :eek:
I'd also be interested in any thoughts on easily correcting this - maybe a simple pass-through register from the main level to the basement? The door in question is 90* from another door to our garage (they open into each other), which means making sure they don't bang into each other, so it would be nice to be able to close the basement door.