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Radiator Heat Emission Equation (EN 442 Standard):
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The Radiator Heat Emission Equation based on EN 442 standard calculates the thermal output of heating radiators. It provides an accurate assessment of heat emission based on the radiator size constant and temperature difference between water and air.
The calculator uses the EN 442 standard equation:
Where:
Explanation: The equation accounts for the non-linear relationship between temperature difference and heat emission, following the EN 442 European standard for radiator testing.
Details: Accurate radiator output calculation is crucial for proper heating system design, ensuring adequate room heating, energy efficiency, and correct radiator sizing for different spaces.
Tips: Enter the radiator constant (k) based on manufacturer specifications and the mean temperature difference between water and air. Both values must be positive numbers.
Q1: What is the EN 442 standard?
A: EN 442 is the European standard that specifies testing methods and requirements for radiators and convectors, ensuring consistent performance measurements across manufacturers.
Q2: How do I find the k constant for my radiator?
A: The k constant is typically provided by radiator manufacturers in their technical specifications and varies based on radiator size, type, and model.
Q3: What is typical ΔT for residential heating?
A: Typical ΔT values range from 30°C to 50°C, with 50°C being common for standard radiator sizing calculations.
Q4: Why is the exponent 1.3 used?
A: The 1.3 exponent reflects the non-linear heat transfer characteristics of radiators, where output increases more rapidly than the temperature difference.
Q5: Can this calculator be used for all radiator types?
A: This calculator applies to most standard panel radiators following EN 442. Special radiators or those with integrated fans may have different calculation methods.