1. What is Geothermal Heat Pump Sizing?

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

2. How Does the Calculator Work?

The calculator uses the following 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 sizing prevents short cycling (oversized units), inadequate heating/cooling (undersized units), and maximizes energy efficiency. A properly sized system will also last longer and provide more consistent comfort.

4. Using the Calculator

Tips:

• Measure the total area to be conditioned
• Select BTU factor based on climate (higher for colder regions)
• Choose insulation adjustment based on your building's insulation quality

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: Excellent insulation includes high R-value materials throughout. Average means standard insulation. Poor indicates minimal or old insulation.

Q3: Should I round up the calculated size?
A: Round to the nearest standard unit size, but avoid significantly oversizing (no more than 15% over calculated value).

Q4: What about cooling requirements?
A: In most cases, the heating requirement determines the size, as it's typically larger than cooling needs.

Q5: Are there other factors to consider?
A: Yes, including ceiling height, window quality, air infiltration, and local climate extremes may require professional assessment.