Easy to do: measure the area of the duct or whatever it is you're measuring in square inches, convert to square feet, and multiply by the fpm value to get cfm. Example: a 4" x 10" register opening with a 350 fpm reading. Opening (4 x10) = 40 sq inches. Divide by 144 to get sq ft (40 / 144 = .277). Multiply by fpm value to get cfm (.277 x 350) = 97.2 cfm
Thank you!
I got mine today. TY. Now trying to convert fpm feet per minute to cfm.
Easy to do: measure the area of the duct or whatever it is you're measuring in square inches, convert to square feet, and multiply by the fpm value to get cfm. Example: a 4" x 10" register opening with a 350 fpm reading. Opening (4 x10) = 40 sq inches. Divide by 144 to get sq ft (40 / 144 = .277). Multiply by fpm value to get cfm (.277 x 350) = 97.2 cfm
@@guylavoie1342 Thanks Guy. URDB - U R Dee Best.
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