1. What is Heat Pump Sizing?

Heat pump sizing determines the appropriate capacity (in BTUs) needed to efficiently heat and cool your home. Proper sizing is crucial for energy efficiency, comfort, and system longevity.

2. How Does the Calculator Work?

The calculator uses the standard 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 home size, climate factors, and insulation quality to recommend an appropriately sized heat pump.

3. Importance of Proper Sizing

Details: An oversized heat pump will short-cycle, reducing efficiency and comfort. An undersized unit will struggle to maintain temperature. Proper sizing ensures optimal performance and energy savings.

4. Using the Calculator

Tips: Measure your home's square footage accurately. Select insulation quality based on your home's actual insulation. Choose your climate zone for more precise results.

5. Frequently Asked Questions (FAQ)

Q1: What's the typical BTU factor range?
A: 20-40 BTU/sq ft. Use 30 as average, higher for colder climates or older homes, lower for warmer climates or well-insulated homes.

Q2: How does insulation affect sizing?
A: Poor insulation (1.2 multiplier) requires larger capacity, while excellent insulation (0.8) allows for smaller units.

Q3: Should I round up to the nearest standard size?
A: Generally yes, but don't oversize by more than 15%. It's better to be slightly undersized than significantly oversized.

Q4: What about multi-zone systems?
A: This calculator provides whole-home sizing. For multi-zone systems, consult an HVAC professional for room-by-room calculations.

Q5: Are there other factors to consider?
A: Yes - ceiling height, window quality, sun exposure, and air leakage all affect sizing. Professional Manual J calculations are most accurate.