Is there a spacepak or unico system that can provide high energy efficiency? Everything i read seems to say that i will only get about 11 seer with high velocity which sucks. I see spacepak now makes something called an air space with an ec motor... Is this something better?
Also, would my current 2 stage Lennox xc21 4 ton unit be compatible with a hv system? I have not found any info on using 2 stage ac units with high velocity systems.
I am planning an addition and have so many challenges with running large ductwork that it almost makes it impossible.