Electric Heater Sizing Calculator

Heater Wattage Formula:

\[ W = \text{Area} \times 10 \]

Required Heater Wattage (W):

Definition: This calculator estimates the wattage needed for an electric heater based on room area.

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

The calculator uses the formula:

\[ W = \text{Area} \times 10 \]

Where:

Explanation: The standard rule of thumb is 10 watts per square foot for adequate heating in moderate climates.

Details: Correct sizing ensures energy efficiency, proper heating, and prevents overloading circuits.

Tips: Enter the room area in square feet. The value must be > 0.

Q1: Why 10 watts per square foot?
A: This is the standard baseline for moderate climates. Colder climates may require 12-15 watts per sq ft.

Q2: What if my room has high ceilings?
A: Increase wattage by 10-20% for ceilings over 8 feet.

Q3: Does this account for insulation?
A: No, poorly insulated rooms may need 20-30% more wattage.

Q4: Can I use multiple smaller heaters?
A: Yes, you can divide the total wattage among multiple units.

Q5: What about other heat sources?
A: If you have significant other heat sources (sunlight, appliances), you may reduce wattage by 10-15%.