1. What is an Electric Radiator Calculator UK?

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

Purpose: It helps homeowners and electricians determine the appropriate size of electric radiators needed for efficient heating.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The formula converts British Thermal Units per hour to kilowatts using the conversion factor 3412 BTU/h = 1 kW.

3. Importance of Correct Radiator Sizing

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

4. Using the Calculator

Tips: Enter the heat output in BTU/h. The value must be > 0. The calculator will output the equivalent radiator size in kW.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my room's heat output in BTU?
A: Use a BTU calculator that considers room size, insulation, window area, and other factors.

Q2: Why 3412 as the conversion factor?
A: 1 kW equals 3412.142 BTU/h based on the International Steam Table calorie definition.

Q3: Should I round up the calculated kW value?
A: Yes, electric radiators come in standard sizes, so round up to the nearest available model.

Q4: Does this account for UK voltage standards?
A: Yes, the calculation is appropriate for UK's 230V electrical system.

Q5: How does insulation affect radiator size?
A: Better insulation reduces required BTU output, while poor insulation increases it.