Duct Velocity
—
fpm
Pipe Velocity
—
ft/s
Recommended Velocity Ranges
| Duct Application | Min (fpm) | Max (fpm) |
|---|---|---|
| Main Trunk (low vel.) | 600 | 2,500 |
| Main Trunk (high vel.) | 1,500 | 4,500 |
| Branch Duct | 400 | 2,000 |
| Return Air | 400 | 1,500 |
| Outside Air Intake | 400 | 1,000 |
| Exhaust / Relief | 400 | 2,500 |
| Pipe Application | Min (ft/s) | Max (ft/s) |
|---|---|---|
| Chilled Water | 2 | 12 |
| Hot Water (heating) | 2 | 10 |
| Condenser Water | 3 | 12 |
| Domestic Cold | 2 | 8 |
| Domestic Hot | 2 | 6 |
| Steam Condensate | 1 | 7 |