Ac Unit Installation

[jemcdan]

I Am Getting Ready To Replace My Gas Split System With A Tempstar Phad 12 Seer Electric Package Unit ,80% Afue , 7.2 Hspf. The Cfm Is 1200. I Will Be Heating 1675 Sq Ft.
I Was Concerned About The Air Return, I Would Like To Run Two Returns, Could You Give Me The Size Of The Returns.

[Grady]

For 1200 cfm, you would need 2-12" round metal ducts or 2-14" flex ducts