Radiator Heat Output Formula:
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Definition: This calculator estimates the actual heat output of a radiator based on its nominal output and the temperature difference between the radiator and the room.
Purpose: It helps homeowners and heating professionals determine the effective heat output of radiators under different operating conditions.
The calculator uses the formula:
Where:
Explanation: The formula accounts for the non-linear relationship between temperature difference and heat output.
Details: Accurate output calculation ensures proper room heating, energy efficiency, and correct radiator sizing.
Tips: Enter the radiator's nominal output (found on manufacturer specs) and the temperature difference between radiator surface and room air. All values must be > 0.
Q1: What is ΔT (temperature difference)?
A: It's the difference between the average radiator temperature and the desired room temperature (typically 20°C).
Q2: Why is the exponent 1.3 used?
A: This accounts for the non-linear heat transfer characteristics of radiators (combination of radiation and convection).
Q3: How do I find the nominal output?
A: Check the radiator manufacturer's specifications, usually given for ΔT=50°C.
Q4: What's a typical ΔT for modern systems?
A: Conventional systems: 50°C, condensing boilers: 30-40°C, heat pumps: 20-30°C.
Q5: Does this work for all radiator types?
A: The formula works for most standard radiators, but some designs may have slightly different characteristics.