1. What is Heat Pump Sizing?

Heat pump sizing refers to determining the appropriate capacity (in BTU) needed to effectively heat or cool a given space. Proper sizing is crucial for efficiency, comfort, and system longevity.

2. How Does the Calculator Work?

The calculator uses the basic heat pump sizing formula:

Where:

• \( Area \) — Square footage of the space (sq ft)
• \( Factor \) — BTU per square foot (typically 20-40 BTU/sq ft)

Explanation: The factor varies based on climate, insulation quality, and other factors. The calculator also converts BTU to tons (1 ton = 12,000 BTU).

3. Importance of Proper Sizing

Details: An undersized unit will struggle to maintain temperature, while an oversized unit will short cycle, reducing efficiency and lifespan. Proper sizing ensures optimal performance and energy efficiency.

4. Using the Calculator

Tips:

• Measure your space accurately in square feet
• Select appropriate BTU factor based on climate and insulation
• Consider professional assessment for complex spaces

5. Frequently Asked Questions (FAQ)

Q1: What BTU factor should I use?
A: Mild climates: 20-30 BTU/sq ft, Moderate: 25-35, Extreme: 30-40. Also consider insulation quality.

Q2: How many square feet will a 3-ton heat pump cover?
A: Approximately 1,200-1,500 sq ft in moderate climates (36,000 BTU ÷ 25-30 BTU/sq ft).

Q3: What other factors affect heat pump sizing?
A: Ceiling height, window quality, insulation, sun exposure, and local climate all impact sizing needs.

Q4: Is bigger always better for heat pumps?
A: No, oversized units short cycle, reducing efficiency and comfort while increasing wear.

Q5: Should I get a professional load calculation?
A: For whole-home systems, yes. Manual J calculations consider all factors for precise sizing.