Heater Size Formula:
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Definition: This calculator estimates the required heating capacity (in BTUs) for an electric garage heater based on the desired temperature increase and garage volume.
Purpose: It helps homeowners and professionals properly size electric heaters for garages to ensure efficient heating without overspending on oversized units.
The calculator uses the formula:
Where:
Explanation: The formula accounts for the energy needed to raise the temperature of the air in your garage by the desired amount.
Details: Correct sizing ensures energy efficiency, prevents short cycling, maintains comfortable temperatures, and extends heater lifespan.
Tips:
Q1: What's a typical temperature increase for garages?
A: Most people heat garages 20-30°F above outdoor temperatures for comfort.
Q2: How do I convert BTUs to watts?
A: Divide BTUs by 3.412 to get watts (for electric heaters).
Q3: Does this account for insulation?
A: No, this is a basic calculation. Well-insulated garages need less heating power.
Q4: What if my garage has high ceilings?
A: Use the actual cubic footage (length × width × height) for accurate results.
Q5: Should I round up the result?
A: Yes, it's recommended to round up to the nearest standard heater size.