1. What is Heat Pump Capacity?

Heat pump capacity refers to the heating or cooling output of a heat pump system, measured in British Thermal Units per hour (BTU/hr). Proper sizing is crucial for efficiency and comfort.

2. How Does the Calculator Work?

The calculator uses the basic heat pump capacity formula:

Where:

• \( Capacity \) — Heat pump output (BTU/hr)
• \( Area \) — Area to be conditioned (square feet)
• \( Factor \) — BTU per square foot factor (typically 30-60 BTU/ft²)

Explanation: The factor accounts for climate, insulation, and other variables that affect heating/cooling needs.

3. Importance of Proper Sizing

Details: Correct heat pump sizing ensures energy efficiency, proper dehumidification, and system longevity. Oversized units short-cycle, while undersized units can't maintain comfort.

4. Using the Calculator

Tips: Enter area in square feet and select appropriate factor (30 for well-insulated homes in mild climates, up to 60 for poor insulation or cold climates).

5. Frequently Asked Questions (FAQ)

Q1: What's the typical factor range?
A: Factors range from 30-60 BTU/ft² depending on climate, insulation, and home characteristics.

Q2: How does climate affect the factor?
A: Colder climates generally require higher factors (40-60 BTU/ft²), while milder climates use lower factors (30-40 BTU/ft²).

Q3: Should I use the same factor for cooling?
A: Cooling typically requires about 20 BTU/ft², but a Manual J calculation is recommended for precise sizing.

Q4: What about high ceilings or many windows?
A: These factors may require increasing the capacity. Consider a professional load calculation for complex situations.

Q5: Is this calculation sufficient for final sizing?
A: This provides a rough estimate. Professional Manual J calculations consider more variables for precise sizing.