1. What is a Radiator Size Calculator?

Definition: This calculator converts heating load in BTU/h to radiator size in kilowatts (kW) for UK heating systems.

Purpose: Helps homeowners and heating engineers select properly sized radiators based on room heating requirements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Radiator power output (kilowatts)
• \( Q_{btu} \) — Heating load (BTU per hour)

Explanation: The formula converts British Thermal Units to kilowatts using the conversion factor 3412 BTU/h = 1 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: Enter your room's heating load in BTU/h. The value must be > 0. The calculator will output the required radiator size in kW.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my room's heating load?
A: Use a heat loss calculator or consult a heating engineer who can calculate it based on room dimensions, insulation, and other factors.

Q2: Why 3412 in the formula?
A: This is the conversion factor between BTU/h and kW (1 kW = 3412.142 BTU/h).

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

Q4: Does this account for different radiator types?
A: No, this gives basic kW requirements. Different radiator materials (steel, aluminum) may have different sizes for the same output.

Q5: What's a typical radiator size for a UK bedroom?
A: Typically 1-2 kW depending on room size, insulation, and other factors.