DIY Home Improvement, Remodeling & Repair Forum

DIY Home Improvement, Remodeling & Repair Forum (http://www.houserepairtalk.com/forum.php)
-   HVAC (http://www.houserepairtalk.com/f8/)
-   -   How large should my furnace intake duct be? (http://www.houserepairtalk.com/f8/how-large-should-my-furnace-intake-duct-9727/)

landbug 08-09-2010 09:22 PM

How large should my furnace intake duct be?
 
I have a 2500 sq/ft single story home. I want to install a new furnace-AC unit. The system I want to install is a Rheem 125K BTU Furnace. My current intake (return) duct measures 7" X 20". According to my calculations, I'm supposed to be able to move 1560 CFM (for a 125K BTU furnace.) Will the 7" X 20" duct handle this? If not, then what size should I consider?


All times are GMT -6. The time now is 06:31 PM.