1. What is a Radiator Sizing Calculator UK?

Definition: This calculator converts the required heat output in BTU/h to radiator size in kilowatts (kW) for UK homes.

Purpose: It helps homeowners and heating engineers select the correctly sized radiator for efficient room heating.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Radiator power (kilowatts)
• \( Q_{btu} \) — Heat output required (BTU per hour)
• 3412 — Conversion factor from BTU/h to kW

Explanation: The heat requirement in BTU/h is divided by 3412 to convert to the equivalent radiator size in kW.

3. Importance of Correct Radiator Sizing

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

4. Using the Calculator

Tips: Enter the required heat output in BTU/h (calculated separately based on room size, insulation, etc.). The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my required BTU/h?
A: Use a room heat calculator that considers room dimensions, insulation, window area, and other factors.

Q2: Why 3412 as the conversion factor?
A: 1 kW equals 3412 BTU/h - this is the standard conversion for heating systems.

Q3: Should I round up the radiator size?
A: Yes, it's common practice to round up to the nearest available radiator size for safety margin.

Q4: Does this account for room type?
A: No, the BTU requirement should already account for room type (bathroom, bedroom, etc.).

Q5: What about radiator type differences?
A: The calculation is standard, but consult manufacturer specs as different radiator types may have varying outputs.