1. What is a Heat Pump Sizing Calculator?

Definition: This calculator estimates 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 determine the appropriate heat pump capacity for efficient heating.

2. How Does the Calculator Work?

The calculator uses the formula:

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 heat pump size needed to meet the heating requirements efficiently.

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 Coefficient of Performance (COP)?
A: COP measures heat pump efficiency - the ratio of heat output to electrical energy input.

Q2: What's a typical COP value?
A: Modern heat pumps typically have COPs between 3.0-4.5 under optimal conditions.

Q3: How do I determine my building's heat load?
A: Use Manual J calculations, energy audits, or consult an HVAC professional.

Q4: Should I oversize my heat pump?
A: No, proper sizing is crucial. Oversizing leads to inefficiency and increased costs.

Q5: Does this account for extreme temperatures?
A: No, consider local climate and the heat pump's performance at low temperatures.