I am intrested in educating my self about my HVAC system and checking and verifying some things. I hope this will not be considered DIY.
I have an older house built in 1980. We had the outisde condensor unit changed a few years ago to a Bryant 113RNA036-C, which I think is a 3-ton heat pump.
We have a 2 returns (ceiling and floor level), but the other day I disovered the floor return was sealed so that no flow would occur. I wonder why this was done? I don't think the tech. that installed the new system noticed this.
I have been trying to verify how much return I need for my Bryant, but the information I see on the net is confusing and inconsistent. The open return in the ceiling is filtered, and uses 20"x30" filter.
I wanted to confirm that this is ok for my present system.
Even better would be to learn in general how a delivery duct system is matched to a return duct system and AC size (tons/btu). A referal for a good book, preferable also a good read, would be greatly apreciated.