Table
Duct Heater kW, CFM, Temperature Rise Table
Duct Heater kW, CFM, Temperature Rise Table reference with assumptions and boundary notes.
Reference boundary
Air-temperature estimate only. It does not replace equipment selection, airflow measurement, or safety controls.
Reference table
Estimate air temperature rise from heater kW and airflow using common HVAC arithmetic.
| Heater kW | Airflow (cfm) | Approx. rise (F) | Approx. rise (C) |
|---|---|---|---|
| 5 | 500 | 31.6 | 17.6 |
| 5 | 1000 | 15.8 | 8.8 |
| 10 | 1000 | 31.6 | 17.6 |
| 15 | 1500 | 31.6 | 17.6 |
| 20 | 2000 | 31.6 | 17.6 |
| 30 | 3000 | 31.6 | 17.6 |
Use notes
- Use this table for preliminary reference and arithmetic checks only.
- Confirm equipment ratings, product markings, installation conditions, utility requirements, and the local authority requirements before design or field use.