1. What is Heat Pump Sizing?

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

2. How Does the Calculator Work?

The calculator uses the 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 your home, climate factors (through the BTU factor), and insulation quality.

3. Importance of Proper Sizing

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

4. Using the Calculator

Tips:

• Measure your home's total square footage
• Choose BTU factor based on climate: 30 for moderate, 40 for cold, 20 for mild
• Select insulation quality based on your home's characteristics

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between BTU and tonnage?
A: 12,000 BTU = 1 ton. Most residential heat pumps range from 1.5 to 5 tons.

Q2: Should I round up the calculated size?
A: Heat pumps come in standard sizes. Choose the next available size if between options, but avoid significantly oversizing.

Q3: What other factors affect heat pump sizing?
A: Ceiling height, window quality, sun exposure, and air infiltration also impact sizing needs.

Q4: Is this calculator suitable for all climates?
A: The calculator provides a general estimate. Extreme climates may require professional Manual J calculation.

Q5: How does heat pump sizing compare to AC sizing?
A: Heat pumps are typically sized for heating needs, which are often greater than cooling needs in colder climates.