Wattage Formula:
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Definition: This calculator estimates the wattage required for electric heating based on the area to be heated.
Purpose: It helps homeowners and electricians determine the appropriate wattage for electric heating systems.
The calculator uses the formula:
Where:
Explanation: The standard rule of thumb is that electric heat requires about 10 watts per square foot of space.
Details: Proper wattage estimation ensures efficient heating, prevents circuit overloads, and helps select appropriately sized heating equipment.
Tips: Simply enter the area in square feet that needs to be heated. The value must be > 0.
Q1: Why 10 watts per square foot?
A: This is a general rule for moderate climates. Colder climates may require 12-15 watts per sq ft.
Q2: Does this account for insulation quality?
A: No, this is a basic calculation. Poor insulation may require 20-30% more wattage.
Q3: What type of electric heating is this for?
A: This applies to baseboard heaters, radiant panels, and other direct electric heating systems.
Q4: How do I convert this to amps?
A: Divide watts by voltage (usually 120V or 240V). For example, 1500W ÷ 120V = 12.5A.
Q5: Should I round up the calculated wattage?
A: Yes, it's recommended to round up to the nearest standard heater size available.