What is the total AHU air flow in your parents house?Originally posted by brianshouse
All the beach houses here use flex duct but they do not pull flex through the webs, they have enough room to run the supply trunk in the center of the truss, and then the flew is run beside the trusses.
Somehow my trusses where engineered different and my space is too small so I will have to run the supply trunk differently.
My parents have the same stle house and their 3 ton system just doesn't do it with the cathedral ceilings, thats why I'm going with 3.5 ton.
What is the deltaT across the coil?
i.e. 75'F room temp, 56'F at coil outlet ?
What is the S.A. temp at the AHI outlet and at the diffuser?
Use R-20 spray foam, THEN 2.5-Ton unit mounted in conditioned space may be sufficient.