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-   -   Return Filtr Grille (http://www.diychatroom.com/f17/return-filtr-grille-114070/)

JJboy 08-15-2011 12:25 AM

Return Filtr Grille
 
1 Attachment(s)
I made this table, can anyone confirm these values? :thumbsup:

beenthere 08-15-2011 04:13 AM

Those numbers are correct, as long as you remember that they are the AK/free area numbers, not the grille size numbers.

EG: A 20X20 filter grille, is 400 sq in total, but has a AK/free area of only 276 sq in/1.917 sq ft. So at 575 CFM it has a air velocity of 300 FPM, at 767 CFM it has a air velocity of 400 FPM.

Go to Hart&Cooley's website, and download their register/grille specs/tech guides.

JJboy 08-15-2011 11:53 AM

Thanks Beenthere :thumbsup:

http://www.hartandcooley.com/Librari...?download=true


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