Convert Thermochemical kilocalorie per hour per square metre per degree Celsius to Celsius Heat Unit per hour per square foot per degree Celsius
Convert Thermochemical kilocalorie per hour per square metre per degree Celsius (kcal(th)/(h·m²·°C)) 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) = kcal(th)/(h·m²·°C) × 0.204679169
About Thermochemical kilocalorie per hour per square metre per degree Celsius
The thermochemical kilocalorie per hour per square metre per degree Celsius (kcal(th)/(h·m²·°C)) equals 4184/3600 ≈ 1.1622 W/(m²·K) (1 kcal(th) = 4184 J; 1 °C = 1 K). Widely used in continental European and Soviet-era building physics, HVAC standards, and heat exchanger design manuals where wall U-values were tabulated in this unit. 1 kcal(th)/(h·m²·°C) ≈ 1.1622 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
| Thermochemical kilocalorie per hour per square metre per degree Celsius (kcal(th)/(h·m²·°C)) | Celsius Heat Unit per hour per square foot per degree Celsius (CHU/(h·ft²·°C)) |
|---|---|
| 1 kcal(th)/(h·m²·°C) | 0.204679 CHU/(h·ft²·°C) |
| 2 kcal(th)/(h·m²·°C) | 0.409358 CHU/(h·ft²·°C) |
| 5 kcal(th)/(h·m²·°C) | 1.0234 CHU/(h·ft²·°C) |
| 10 kcal(th)/(h·m²·°C) | 2.04679 CHU/(h·ft²·°C) |
| 25 kcal(th)/(h·m²·°C) | 5.11698 CHU/(h·ft²·°C) |
| 50 kcal(th)/(h·m²·°C) | 10.234 CHU/(h·ft²·°C) |
| 100 kcal(th)/(h·m²·°C) | 20.4679 CHU/(h·ft²·°C) |