1. What is a Heat Pump Usage Calculator?

Definition: This calculator estimates the electrical energy consumption of a heat pump based on its heat output and coefficient of performance.

Purpose: It helps homeowners and HVAC professionals determine the energy efficiency and operating costs of heat pump systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E \) — Energy usage (kilowatt-hours)
• \( Q_{btu} \) — Heat output (BTU per hour)
• \( COP \) — Coefficient of Performance (dimensionless)
• 3412 — Conversion factor from BTU to kWh

Explanation: The heat output is converted from BTU to kWh and divided by the system's efficiency (COP) to determine electrical energy consumption.

3. Importance of Heat Pump Efficiency

Details: Understanding energy usage helps in selecting efficient systems, estimating operating costs, and comparing different heat pump models.

4. Using the Calculator

Tips: Enter the heat pump's output in BTU/h and its COP (typically 2.5-4.0 for residential systems). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical COP for heat pumps?
A: Residential heat pumps typically have COPs between 2.5 and 4.0, with higher numbers indicating better efficiency.

Q2: Where can I find my heat pump's COP?
A: Check the manufacturer's specifications or energy guide label. It's often listed in technical documentation.

Q3: Why is 3412 used in the formula?
A: 3412 BTU equals 1 kWh, which is the conversion factor between these energy units.

Q4: Does this calculate hourly or annual usage?
A: This calculates hourly usage. Multiply by operating hours to estimate daily, monthly, or annual consumption.

Q5: How does outdoor temperature affect these calculations?
A: COP varies with temperature. Use the COP rating for your specific operating conditions for accurate results.