I have 4 contractors bidding the replacement of my 2 AC systems.
Downstrairs is 17 year old 5 ton Goodman
Upstrairs is 17 year old 3.5 ton Goodman
4400 Sqft 5 BR in Houston Texas
The existing systems both have 1 Return Air 25" x 25" grill connected to 18" flexible hose to AC system in the attic.
Only rooms upstairs are 4 bedrooms. Much of upstairs is open to the downstairs.(great room in the middle of the house)
The Rudd provider is telling me I need to add RA for the downstairs. The way the house is built it is impractical to add another RA downstairs in the traditional way. He says he is installing 4 separate 4"x8" RA on each of the 4 upstairs bedrooms. He is also proposing re-tasking the existing 25x25 fed via 18" flex hose to the downstairs 5 ton AC so that the downstairs is fed via 2 25"x25" grills each connected to separate 18" flex hoses which would be connected to the 5 ton plenum.
Does this sound right to you pros?