??
O.k.
Now...I keep hearing different things about ...only using one air handler in the basement ...to cool the entire house..
zone dampers anyone ?

I have found in my... 19 yrs of service work...it works best if you have..
2 systems ...
one for each floor....
or
zone dampers..
But....where is the cost savings
or is there ?
and what happens ...when both floors are calling ?
Keep it simple
Air Handler......for each floor

thoghts