1. What is Heat Pump Sizing?

Heat pump sizing is the process of determining the appropriate capacity (in BTUs) needed to efficiently heat or cool a building. Proper sizing ensures optimal performance, energy efficiency, and equipment longevity.

2. How Does the Calculator Work?

The calculator uses the standard heat pump sizing formula:

Where:

• \( Area \) — Square footage of the space (sq ft)
• \( Factor \) — BTU per square foot (typically 20-40 BTU/sq ft)
• \( Insulation\ Adjustment \) — Multiplier based on insulation quality (0.8-1.2)

Explanation: The calculation accounts for the size of the space, climate factors (through the BTU factor), and the building's insulation quality.

3. Importance of Proper Sizing

Details: Correct heat pump sizing is crucial for energy efficiency, comfort, and system longevity. An undersized unit will struggle to maintain temperature, while an oversized unit will short-cycle, reducing efficiency and lifespan.

4. Using the Calculator

Tips:

• Measure your space accurately in square feet
• Choose a BTU factor based on your climate (higher for colder regions)
• Select the insulation adjustment that best matches your building

5. Frequently Asked Questions (FAQ)

Q1: What BTU factor should I use?
A: Use 20-25 for mild climates, 30 for moderate climates, and 35-40 for cold climates.

Q2: How do I assess my insulation quality?
A: Poor insulation = noticeable drafts, high energy bills; Excellent = tight construction, low energy bills.

Q3: Should I round up the BTU result?
A: Choose the nearest available unit size, but it's better to slightly undersize than oversize.

Q4: Does ceiling height matter?
A: Yes, for ceilings over 8 feet, multiply the area by (ceiling height ÷ 8).

Q5: What about windows and sun exposure?
A: Large windows or significant sun exposure may require adjusting the BTU factor up or down by 10%.