Convert International table BTU per hour per square foot to Celsius Heat Unit per hour per square foot
Convert International table BTU per hour per square foot (BTU(IT)/(h·ft²)) to Celsius Heat Unit per hour per square foot (CHU/(h·ft²)) instantly and accurately.
Conversion Formula
CHU/(h·ft²) = BTU(IT)/(h·ft²) × 0.5555555556
About International table BTU per hour per square foot
The international table BTU per hour per square foot (BTU(IT)/(h·ft²)) equals 1055.05585262/(3600×0.09290304) ≈ 3.15459 W/m². The standard US heat flux unit in ASHRAE, ASTM, and building codes for thermal resistance (R-value), boiler ratings, and heat exchanger design. 1 BTU(IT)/(h·ft²) ≈ 3.15459 W/m².
About Celsius Heat Unit per hour per square foot
The Celsius heat unit per hour per square foot (CHU/(h·ft²)) equals (9/5)×1055.05585262/(3600×0.09290304) ≈ 5.6783 W/m². The CHU (= 9/5 BTU(IT)) uses a 1 °C temperature interval instead of 1 °F; historically used in UK and Canadian heating engineering. 1 CHU/(h·ft²) ≈ 5.6783 W/m² = (9/5) × BTU(IT)/(h·ft²).
Quick Reference Table
| International table BTU per hour per square foot (BTU(IT)/(h·ft²)) | Celsius Heat Unit per hour per square foot (CHU/(h·ft²)) |
|---|---|
| 1 BTU(IT)/(h·ft²) | 0.555556 CHU/(h·ft²) |
| 2 BTU(IT)/(h·ft²) | 1.11111 CHU/(h·ft²) |
| 5 BTU(IT)/(h·ft²) | 2.77778 CHU/(h·ft²) |
| 10 BTU(IT)/(h·ft²) | 5.55556 CHU/(h·ft²) |
| 25 BTU(IT)/(h·ft²) | 13.8889 CHU/(h·ft²) |
| 50 BTU(IT)/(h·ft²) | 27.7778 CHU/(h·ft²) |
| 100 BTU(IT)/(h·ft²) | 55.5556 CHU/(h·ft²) |