Convert Boiler Horsepower to BTU per Hour
Convert Boiler Horsepower (BHP) to BTU per Hour (BTU/h) instantly and accurately.
Conversion Formula
BTU/h = BHP × 33475
About Boiler Horsepower
One boiler horsepower (BHP) ≈ 9,810 W = 33,475 BTU/h - the power to evaporate 34.5 lb of water per hour at 212°F, standardised by ASME for rating steam boilers. A small office building needs 10-50 BHP; a hospital or large plant 200-2,000 BHP. Critically, 1 BHP is ~13.1× larger than 1 mechanical horsepower (746 W) - a dangerous confusion when specifying heating equipment. 1 BHP ≈ 9,810.6 W.
About BTU per Hour
One BTU per hour (BTU/h) ≈ 0.2931 W - the dominant HVAC capacity unit in the US and Canada. Room air conditioners are universally rated in BTU/h: 12,000 BTU/h = 1 ton of refrigeration = 3,517 W. Home furnaces range from 40,000-150,000 BTU/h. Office building cooling demand is calculated in BTU/h per ft². Engineers convert: BTU/h × 0.2931 = W; or W × 3.412 = BTU/h. 1 BTU/h = 0.29307 W.
Quick Reference Table
| Boiler Horsepower (BHP) | BTU per Hour (BTU/h) |
|---|---|
| 1 BHP | 33475 BTU/h |
| 2 BHP | 66950 BTU/h |
| 5 BHP | 167375 BTU/h |
| 10 BHP | 334750 BTU/h |
| 25 BHP | 836875 BTU/h |
| 50 BHP | 1673750 BTU/h |
| 100 BHP | 3347500 BTU/h |