Heating Coil Calculator
Size heating coils for AHU and duct-mounted applications.
Heating Coil Capacities
| Rows | BTU/sq ft @ 500 FPM | Air PD (in WC) |
|---|---|---|
| 1 | 10,000-15,000 | 0.10-0.15 |
| 2 | 15,000-25,000 | 0.15-0.25 |
| 3 | 25,000-35,000 | 0.25-0.35 |
| 4 | 35,000-45,000 | 0.35-0.50 |
180F EWT, 60F air delta T
Design Guidelines
Face Velocity: 400-600 FPM typical
Water Velocity: 2-8 ft/s in tubes
Steam Coils: Use distributing tubes
Freeze Protection: Consider glycol or steam