1. What is an Electric Radiator Size Calculator?

Definition: This calculator estimates the required power output (in kW) of an electric radiator for a given room area.

Purpose: It helps homeowners and heating professionals determine the appropriate radiator size 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 area (square meters)
• 44.6 — Standard heat requirement (BTU per square meter)
• 3412 — Conversion factor from BTU to kW

Explanation: The formula converts the standard heat requirement for a room into the electrical power needed for heating.

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: Simply enter the room area in square meters. The value must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is 44.6 BTU/m² used in the formula?
A: This is a standard value for moderate climate zones. It may vary based on insulation and climate conditions.

Q2: Should I round up the calculated radiator size?
A: Yes, it's recommended to round up to the nearest standard radiator size available in the market.

Q3: Does this account for room insulation?
A: No, this is a basic calculation. Poor insulation may require a larger radiator, while excellent insulation may need less.

Q4: How does ceiling height affect the calculation?
A: This calculation assumes standard ceiling heights. For higher ceilings, multiply the result by (actual height / 2.4m).

Q5: Can I use this for multiple rooms?
A: Yes, but calculate each room separately as heating requirements may vary.