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buck545 04-13-2013 06:16 PM

sizing duct
I have a ranch about 800 sg ft...going to be installing duct in attic for ac only, just a lttle help would be great

living room 200sq ft.. two 7in flex faces nw
masterbedroom ..150 7in and one 7inch...southeast
bath 4inch
kitchen,..150 one 7 one 6...sw

also buying a goodman 1.5 ton unit.....guessing main trunk line should be??

beenthere 04-14-2013 05:13 AM


buck545 04-14-2013 07:46 AM

so I guess that i'm good for the sizes of the supply lines?

beenthere 04-14-2013 07:55 AM

Can't say. As no indication of what CFM your trying to put in each individual room. They should be large enough. Its easier to damper down a supply thats over sized, then to run a new bigger line later.

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