maple1
Minister of Fire
My 30% guess was based on 12"dia. return. If it's 14", that would be 154 sq.in. So almost up to the 160" you mentioned for the supply. If I understood things correctly. But there would be other factors like restrictions in either. (Bends, etc.)
I'm over my head already here - so will watch how things progress. You might want to round up some temperature measuring gear to measure duct temps with, and maybe a manometer for flow balancing, for when you try it out & tune things up.
You certainly have a nice furnace - good luck!
I'm over my head already here - so will watch how things progress. You might want to round up some temperature measuring gear to measure duct temps with, and maybe a manometer for flow balancing, for when you try it out & tune things up.
You certainly have a nice furnace - good luck!