1. What is a Stelrad Radiator Size Calculator?

Definition: This calculator estimates the required radiator size in kilowatts (kW) based on room area for UK heating systems using Stelrad radiators.

Purpose: It helps homeowners and heating engineers determine the appropriate radiator size for efficient room heating.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Radiator size in kilowatts
• \( A_{room} \) — Room area in square meters

Explanation: The formula calculates the heat requirement based on standard UK heating assumptions (44.6 BTU per square foot converted to kW).

3. Importance of Proper Radiator Sizing

Details: Correct radiator sizing ensures efficient heating, prevents energy waste, and maintains comfortable room temperatures.

4. Using the Calculator

Tips: Simply enter the room area in square meters. The calculator will determine the recommended radiator size in kW.

5. Frequently Asked Questions (FAQ)

Q1: Why is 44.6 used in the formula?
A: This represents the standard British Thermal Unit (BTU) requirement per square foot for UK rooms, converted to metric measurements.

Q2: Does this work for all radiator brands?
A: While designed for Stelrad radiators, it provides a good estimate for most standard radiators in the UK market.

Q3: What factors might require adjustment?
A: Rooms with high ceilings, poor insulation, or large windows may need 10-20% additional capacity.

Q4: How accurate is this calculation?
A: It provides a good baseline estimate, but professional heat loss calculations may be needed for precise sizing.

Q5: Can I use this for whole house calculations?
A: Yes, calculate each room separately and sum the results for a whole-house radiator requirement.