Heat Pump Size Formula:
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Definition: This calculator estimates the required heat pump size in BTUs based on the square footage of the space to be heated or cooled.
Purpose: It helps homeowners and HVAC professionals determine the appropriate heat pump capacity for efficient temperature control.
The calculator uses the formula:
Where:
Explanation: The square footage is multiplied by 30 (a standard factor for moderate climates) to determine the required BTUs.
Details: Correct sizing ensures energy efficiency, proper temperature control, and prevents excessive wear on the system.
Tips: Enter the square footage of the space to be conditioned. The value must be > 0.
Q1: Why multiply by 30?
A: 30 BTUs per sq ft is a standard estimate for moderate climates. Adjustments may be needed for extreme climates.
Q2: What if I live in a very cold or hot climate?
A: Use 40-45 BTUs/sq ft for cold climates or 20-25 BTUs/sq ft for hot climates.
Q3: Does this account for insulation quality?
A: No, consider adjusting the factor up for poor insulation or down for excellent insulation.
Q4: How do I measure square footage?
A: Multiply length by width of each room and sum all areas to be conditioned.
Q5: What about ceiling height?
A: For ceilings over 8 feet, increase the calculated BTUs by 10% per additional foot.