Non Filter Grille Sizer @500 FPM

Residential Return Grilles without filters are rated to move air at 500 FPM to keep noise levels down and provide minimal resistance. This calculator can also be used to calculate the Filter size of extended pleat filters i.e. 3" 4" 5" as they are rated to catch particulate at 500 FPM.

Enter at least 2 values, then click Calculate.