1. What is the Coefficient of Performance (COP)?

The Coefficient of Performance (COP) is a measure of heat pump efficiency, representing the ratio of heat output to electrical energy input. It's adjusted for climate conditions based on zip code to provide more accurate real-world performance estimates.

2. How Does the Calculator Work?

The calculator uses the COP equation adjusted for climate:

Where:

• \( Q_h \) — Heat output (kW)
• \( W \) — Electrical input (kW)
• \( Climate\ Factor \) — Adjustment based on zip code (0.7-1.0)

Explanation: The basic COP is adjusted downward based on typical winter temperatures in the zip code region, as heat pumps become less efficient in colder climates.

3. Importance of COP Calculation

Details: COP helps compare heat pump efficiency, estimate operating costs, and determine environmental impact. Climate-adjusted COP provides more realistic expectations for performance in your specific location.

4. Using the Calculator

Tips: Enter heat output and electrical input in kW, and your 5-digit US zip code. The calculator will adjust for your regional climate conditions.

5. Frequently Asked Questions (FAQ)

Q1: What is a good COP value?
A: Typical values range from 2-4. Higher is better. Values above 3 are considered excellent for cold climates.

Q2: Why does zip code affect COP?
A: Heat pumps become less efficient as outdoor temperatures drop. Colder regions see reduced performance in winter.

Q3: How accurate is the climate factor?
A: This calculator uses generalized regional factors. For precise calculations, consult manufacturer data for your specific model and local weather data.

Q4: Can COP be greater than 1?
A: Yes! Heat pumps move heat rather than generate it, so they can deliver more energy than they consume.

Q5: What's the difference between COP and HSPF?
A: HSPF is a seasonal measure for heating, while COP is an instantaneous efficiency measurement at specific conditions.