What Size Heat Pump Calculator

Heat Pump Size Formula:

\[ \text{Size} = \frac{\text{Load}}{\text{COP}} \]

Heat Pump Size (kW):

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1. What is a Heat Pump Size Calculator?

Definition: This calculator determines the required heat pump size based on the building's heat load and the system's coefficient of performance (COP).

Purpose: It helps HVAC professionals and homeowners properly size heat pumps for efficient heating and cooling.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \text{Size} = \frac{\text{Load}}{\text{COP}} \]

Where:

\( \text{Size} \) — Required heat pump capacity (kW)
\( \text{Load} \) — Building heat load (kW)
\( \text{COP} \) — Coefficient of Performance (dimensionless)

Explanation: The heat load is divided by the COP to determine the minimum heat pump size needed to meet the heating requirements.

3. Importance of Proper Heat Pump Sizing

Details: Correct sizing ensures energy efficiency, optimal performance, and prevents short-cycling or insufficient heating capacity.

4. Using the Calculator

Tips: Enter the building's heat load in kW and the heat pump's COP (default 3.5). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical COP value?
A: Modern heat pumps typically have COPs between 3.0-4.5, with higher values indicating better efficiency.

Q2: How do I determine my building's heat load?
A: A professional heat loss calculation is recommended, or use our Heat Load Calculator tool.

Q3: Should I round up the calculated size?
A: Yes, it's common practice to round up to the nearest available heat pump size for safety margin.

Q4: Does this work for cooling too?
A: Yes, but use the cooling load and SEER/EER rating for cooling calculations.

Q5: What if my climate is very cold?
A: In cold climates, consider the heat pump's performance at lower temperatures and possibly size up.