1. What is Ductless Heat Pump Sizing?

Ductless heat pump sizing determines the appropriate heating/cooling capacity (measured in BTUs) needed for a space based on its square footage and other factors. Proper sizing is crucial for efficiency and comfort.

2. How Does the Calculator Work?

The calculator uses the basic sizing formula:

Where:

• \( BTU \) — British Thermal Units (heating/cooling capacity)
• \( Area \) — Square footage of the space
• \( Factor \) — BTU per square foot (typically 20-40 BTU/sq ft)

Explanation: The factor accounts for climate, insulation, and other conditions. Colder climates or poorly insulated spaces need higher factors.

3. Importance of Proper Sizing

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

4. Using the Calculator

Tips: Measure your space accurately. For open floor plans, include connected areas. Adjust the factor based on insulation quality and local climate.

5. Frequently Asked Questions (FAQ)

Q1: What's the typical BTU factor range?
A: Generally 20-40 BTU/sq ft. Use 20-25 for well-insulated spaces in moderate climates, 30-40 for older homes or colder climates.

Q2: Should I round up the BTU result?
A: Heat pumps come in standard sizes (9k, 12k, 18k, 24k BTU, etc.). Round to the nearest available size, slightly larger if between sizes.

Q3: What about room height?
A: Standard calculations assume 8-foot ceilings. For higher ceilings, increase the factor or calculate cubic footage instead.

Q4: Does window count matter?
A: Yes, rooms with many windows may need a higher factor (add 10% for 2+ windows, 20% for large picture windows).

Q5: What if my space is very sunny or shaded?
A: South-facing rooms may need 10% more capacity, while heavily shaded rooms may need 10% less.