1. What is an Electric Radiator Size Calculator?

Definition: This calculator estimates the appropriate size (in kW) of an electric radiator needed to heat a room based on its floor area.

Purpose: It helps homeowners and professionals select the right electric radiator for efficient room heating.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Radiator power output (kilowatts)
• \( A_{room} \) — Room floor area (square meters)
• 44.6 — BTU per hour per square meter (standard heating requirement)
• 3412 — Conversion factor from BTU/hr to kW

Explanation: The formula converts the standard heating requirement from BTU to kW based on room area.

3. Importance of Correct Radiator Sizing

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

4. Using the Calculator

Tips: Simply enter your room area in square meters. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is 44.6 BTU/hr/m² used?
A: This is a standard heating requirement for moderately insulated rooms in temperate climates.

Q2: Should I adjust for room insulation?
A: Yes, for poorly insulated rooms add 10-20%, for well-insulated rooms subtract 10-20% from the result.

Q3: Does this account for room height?
A: The standard calculation assumes 2.4-2.7m ceilings. For higher ceilings, multiply by (your ceiling height/2.5).

Q4: What about room type?
A: Bathrooms may need 10-15% more power, while bedrooms may need slightly less.

Q5: How accurate is this calculation?
A: It provides a good estimate but consider professional assessment for exact requirements.