Air Distribution Calculator
Size diffusers, grilles, and registers for proper air distribution.
Diffuser Selection Guide
| Size | CFM Range | Throw (ft) |
|---|---|---|
| 6x6 | 50-100 | 3-6 |
| 8x8 | 75-150 | 5-8 |
| 10x10 | 100-200 | 6-10 |
| 12x12 | 150-300 | 8-12 |
| 14x14 | 200-400 | 10-15 |
4-way ceiling diffuser typical values
Design Guidelines
ADPI Goal: 80% minimum for comfort
Throw: 0.75x distance to wall typical
NC Level: Match space requirements
Return: 300-500 FPM face velocity