Diffuser Grille Sizing: linear_slot_3in
Supply diffuser and return grille performance data — CFM range, throw distance to 50 fpm, NC ratings, face velocity, and static pressure drop by diffuser type and neck size
| diffuser type | neck size in | NC rating (NC) | cfm max (cfm) | cfm min (cfm) | face velocity fpm (fpm) | notes | static pressure drop inwg (inWG) | throw 50fpm ft (ft) |
|---|---|---|---|---|---|---|---|---|
| linear_slot_3in | 4ft | 30 | 500 | 200 | 470 | 3-slot 4-ft linear diffuser; perimeter or interior ceiling application | 0.05 | 12 |
| linear_slot_3in | 6ft | 32 | 750 | 300 | 480 | 3-slot 6-ft length | 0.06 | 14 |
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