1. What is an Electric Heater kW Calculator?

Definition: This calculator estimates the power requirement (in kW) for an electric heater based on room size and heating factor.

Purpose: It helps homeowners and professionals determine the appropriate electric heater size for efficient room heating.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( kW \) — Heater power required (kilowatts)
• \( Sq\ Ft \) — Room area (square feet)
• \( Factor \) — Heating factor (typically 0.1 kW/sq ft)

Explanation: The room area is multiplied by a standard heating factor to determine the necessary heater capacity.

3. Importance of Proper Heater Sizing

Details: Correct kW calculation ensures efficient heating, prevents energy waste, and maintains comfortable room temperatures.

4. Using the Calculator

Tips: Enter the room area in square feet and heating factor (default 0.1 kW/sq ft). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is 0.1 kW/sq ft the standard factor?
A: This is a general rule for moderate climates. It provides about 10 watts per square foot, sufficient for most residential spaces.

Q2: When should I adjust the heating factor?
A: Increase to 0.12-0.15 for poorly insulated rooms or colder climates, decrease to 0.08 for well-insulated spaces.

Q3: Does this work for all room shapes?
A: Yes, as long as you accurately calculate the total square footage of the space.

Q4: How does ceiling height affect this calculation?
A: For ceilings over 8 feet, consider adding 10% per additional foot to the calculated kW.

Q5: Is this calculation suitable for heat pumps?
A: No, heat pumps are more efficient and typically require about 1/3 of this kW rating.