1. What is Heat Pump Sizing?

Heat pump sizing refers to determining the appropriate capacity (measured in BTU) needed to effectively heat or cool a room based on its size and other factors. Proper sizing is crucial for efficiency and comfort.

2. How Does the Calculator Work?

The calculator uses the basic heat pump sizing formula:

Where:

• \( BTU \) — British Thermal Units (heat pump capacity)
• \( Area \) — Room area in square feet
• \( Factor \) — BTU per square foot (typically 20-40)

Explanation: The factor accounts for climate, insulation, and other conditions. Higher factors are used for colder climates or poorly insulated spaces.

3. Importance of Proper Sizing

Details: Correctly sized heat pumps operate more efficiently, last longer, and provide better comfort. Oversized units short cycle, while undersized units run constantly.

4. Using the Calculator

Tips: Measure your room's length and width to calculate area. Choose a factor between 20-40 (30 is average). Consider professional assessment for complex spaces.

5. Frequently Asked Questions (FAQ)

Q1: What's the typical BTU factor range?
A: Generally 20-40 BTU/sq ft. Use 20 for well-insulated rooms in mild climates, 30 for average, and 40 for poor insulation or cold climates.

Q2: How does ceiling height affect sizing?
A: For ceilings over 8 feet, increase the factor by 10% per additional foot or calculate cubic footage instead.

Q3: What about windows and sunlight?
A: Add 10% for sunny rooms, subtract 10% for shaded rooms. Each window typically adds 1,000 BTU to requirements.

Q4: Should I round up to standard sizes?
A: Yes, heat pumps come in standard sizes (e.g., 9,000, 12,000, 18,000 BTU). Round up to the nearest standard size.

Q5: When should I consult a professional?
A: For whole-home systems, irregularly shaped rooms, or spaces with high heat gain/loss (like sunrooms or garages).