Convert Celsius Heat Unit per hour per square foot to Thermochemical kilocalorie per hour per square metre
Convert Celsius Heat Unit per hour per square foot (CHU/(h·ft²)) to Thermochemical kilocalorie per hour per square metre (kcal(th)/(h·m²)) instantly and accurately.
Conversion Formula
kcal(th)/(h·m²) = CHU/(h·ft²) × 4.885695035
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).
About Thermochemical kilocalorie per hour per square metre
The thermochemical kilocalorie per hour per square metre (kcal(th)/(h·m²)) equals 4184/3600 ≈ 1.1622 W/m² (1 kcal(th) = 4184 J; 1 h = 3600 s). Used in older continental European and Soviet-era building physics standards for wall and roof heat loss calculations. 1 kcal(th)/(h·m²) ≈ 1.1622 W/m².
Quick Reference Table
| Celsius Heat Unit per hour per square foot (CHU/(h·ft²)) | Thermochemical kilocalorie per hour per square metre (kcal(th)/(h·m²)) |
|---|---|
| 1 CHU/(h·ft²) | 4.8857 kcal(th)/(h·m²) |
| 2 CHU/(h·ft²) | 9.77139 kcal(th)/(h·m²) |
| 5 CHU/(h·ft²) | 24.4285 kcal(th)/(h·m²) |
| 10 CHU/(h·ft²) | 48.857 kcal(th)/(h·m²) |
| 25 CHU/(h·ft²) | 122.142 kcal(th)/(h·m²) |
| 50 CHU/(h·ft²) | 244.285 kcal(th)/(h·m²) |
| 100 CHU/(h·ft²) | 488.57 kcal(th)/(h·m²) |