Heat Pump Size Formula:
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Definition: This calculator determines the required heat pump size based on the heat load and the system's coefficient of performance (COP).
Purpose: It helps HVAC professionals and homeowners properly size heat pump systems for efficient operation.
The calculator uses the formula:
Where:
Explanation: The heat load is divided by the COP to determine the minimum heat pump size needed to meet the demand.
Details: Correct sizing ensures energy efficiency, proper system operation, and prevents short cycling or inadequate heating/cooling.
Tips: Enter the heat load in kW and the COP value (default 3.5). All values must be > 0.
Q1: What is COP in heat pumps?
A: COP (Coefficient of Performance) measures efficiency - the ratio of heat output to electrical energy input.
Q2: What's a typical COP value?
A: Most modern heat pumps have COPs between 3-5, but this varies with temperature conditions.
Q3: How do I find my heat load?
A: Perform a Manual J calculation or consult with an HVAC professional for accurate load calculations.
Q4: Should I add a safety factor?
A: Yes, consider adding 10-20% to the calculated size for extreme weather conditions.
Q5: Does this work for both heating and cooling?
A: Yes, but note that cooling COP (EER) is typically different from heating COP.