Electric Heater Size Calculator

Heater Size Formula:

\[ \text{Size (kW)} = \frac{\text{Area (sq ft)} \times 10}{1000} \]

Heater Size (kW):

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1. What is an Electric Heater Size Calculator?

Definition: This calculator estimates the appropriate size of electric heater needed based on the area to be heated.

Purpose: It helps homeowners and professionals determine the right capacity electric heater for a given space.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \text{Size (kW)} = \frac{\text{Area (sq ft)} \times 10}{1000} \]

Where:

10 W/sq ft — Standard heating requirement for well-insulated spaces
1000 — Conversion factor from watts to kilowatts

Explanation: The formula calculates the heater size needed based on 10 watts per square foot, which is then converted to kilowatts.

3. Importance of Proper Heater Sizing

Details: Correct heater sizing ensures efficient operation, proper heating, and avoids energy waste from oversized units or insufficient heating from undersized ones.

4. Using the Calculator

Tips: Enter the room area in square feet. The calculator will output the recommended heater size in kilowatts.

5. Frequently Asked Questions (FAQ)

Q1: What if my room is poorly insulated?
A: For poorly insulated spaces, you may need 12-15 W/sq ft. Multiply the result by 1.2-1.5 accordingly.

Q2: Does this account for room height?
A: Standard calculation assumes 8-foot ceilings. For higher ceilings, increase the area proportionally.

Q3: What about rooms with lots of windows?
A: Add 10-20% to the calculated size for rooms with significant window area.

Q4: Is this for continuous or supplemental heating?
A: This provides sizing for primary heating. For supplemental heating, you may use smaller units.

Q5: How accurate is this calculation?
A: It provides a good estimate for standard conditions. For precise sizing, consult an HVAC professional.