Heat Loss Formula:
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Definition: This calculator determines the optimal radiator size needed for a space based on heat loss calculations.
Purpose: It helps homeowners and heating professionals select properly sized radiators for efficient heating.
The calculator uses the heat loss formula:
Where:
Explanation: The formula calculates heat loss through surfaces, then applies a safety factor to ensure adequate heating capacity.
Details: Correct sizing ensures energy efficiency, prevents underheating, and avoids overspending on oversized radiators.
Tips: Enter the U-value (default 2.5 for average insulation), room area, temperature difference (default 20°C), and safety factor (default 1.2).
Q1: What is a typical U-value?
A: 2.5 for average insulation, 1.6 for good insulation, or 0.8 for excellent insulation.
Q2: How do I calculate ΔT?
A: Subtract the lowest expected outside temperature from your desired room temperature.
Q3: Why include a safety factor?
A: Accounts for heat loss through windows/doors and ensures the radiator can handle extreme conditions.
Q4: What if my room has multiple external walls?
A: Calculate each wall separately and sum the results, or increase the safety factor.
Q5: How does ceiling height affect calculations?
A: Higher ceilings require more heating - multiply the area by (height/2.4) for rooms over 2.4m tall.