1. What is a Radiator Size Calculator?

Definition: This calculator converts heat output in BTU/h to radiator power in kW, which is the standard measurement for radiators in the UK.

Purpose: It helps homeowners and heating engineers properly size radiators for UK homes based on heat requirements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Radiator power (kilowatts)
• \( Q_{btu} \) — Heat output (British Thermal Units per hour)

Explanation: The conversion factor 3412 represents the number of BTU/h equivalent to 1 kW of power.

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: Enter the required heat output in BTU/h (often calculated based on room size, insulation, and other factors).

5. Frequently Asked Questions (FAQ)

Q1: Why convert BTU/h to kW for UK radiators?
A: UK radiator specifications are typically given in kW, while heat loss calculations often produce results in BTU/h.

Q2: How do I find the BTU requirement for my room?
A: Use our Room Heat Calculator or multiply room volume (m³) by 153 for average insulation.

Q3: What's a typical kW output for UK radiators?
A: Standard radiators range from 0.5kW to 3kW, with larger rooms requiring more powerful radiators.

Q4: Should I round up the calculated kW value?
A: Yes, it's recommended to round up to the nearest available radiator size for sufficient heating capacity.

Q5: Does this account for room-specific factors?
A: No, this is a basic conversion. Consider window size, insulation, and room usage for precise sizing.