Convert International table BTU per hour per square foot per degree Fahrenheit to Celsius Heat Unit per hour per square foot per degree Celsius
Convert International table BTU per hour per square foot per degree Fahrenheit (BTU(IT)/(h·ft²·°F)) to Celsius Heat Unit per hour per square foot per degree Celsius (CHU/(h·ft²·°C)) instantly and accurately.
Conversion Formula
CHU/(h·ft²·°C) = BTU(IT)/(h·ft²·°F) × 1
About International table BTU per hour per square foot per degree Fahrenheit
The international table BTU per hour per square foot per degree Fahrenheit (BTU(IT)/(h·ft²·°F)) equals 1055.05585262/(3600×0.09290304×5/9) ≈ 5.6783 W/(m²·K). The dominant heat transfer coefficient unit in US engineering: ASHRAE handbooks, ASTM standards, boiler and heat exchanger design, and building envelope U-values are all commonly tabulated in this unit. 1 BTU(IT)/(h·ft²·°F) ≈ 5.6783 W/(m²·K).
About Celsius Heat Unit per hour per square foot per degree Celsius
The Celsius heat unit per hour per square foot per degree Celsius (CHU/(h·ft²·°C)) equals ≈ 5.6783 W/(m²·K) - numerically identical to BTU(IT)/(h·ft²·°F). Used in UK and Canadian steam and process engineering; the temperature-interval ratio °F/°C = 5/9 is exactly compensated by the energy ratio CHU/BTU(IT) = 9/5, making both units numerically equal. 1 CHU/(h·ft²·°C) = 1 BTU(IT)/(h·ft²·°F) ≈ 5.6783 W/(m²·K).
Quick Reference Table
| International table BTU per hour per square foot per degree Fahrenheit (BTU(IT)/(h·ft²·°F)) | Celsius Heat Unit per hour per square foot per degree Celsius (CHU/(h·ft²·°C)) |
|---|---|
| 1 BTU(IT)/(h·ft²·°F) | 1 CHU/(h·ft²·°C) |
| 2 BTU(IT)/(h·ft²·°F) | 2 CHU/(h·ft²·°C) |
| 5 BTU(IT)/(h·ft²·°F) | 5 CHU/(h·ft²·°C) |
| 10 BTU(IT)/(h·ft²·°F) | 10 CHU/(h·ft²·°C) |
| 25 BTU(IT)/(h·ft²·°F) | 25 CHU/(h·ft²·°C) |
| 50 BTU(IT)/(h·ft²·°F) | 50 CHU/(h·ft²·°C) |
| 100 BTU(IT)/(h·ft²·°F) | 100 CHU/(h·ft²·°C) |