1. What is Heat Pump Sizing?

Heat pump sizing calculates the required capacity (in BTU or kW) to effectively heat or cool a space. Proper sizing is crucial for efficiency and performance in Australian climates.

2. How Does the Calculator Work?

The calculator uses the fundamental heat pump sizing formula:

Where:

• \( Area \) — Floor area in square feet
• \( Factor \) — BTU per square foot (20-40 depending on climate)
• \( Insulation\ Adjustment \) — Multiplier based on insulation quality (0.8-1.2)

Explanation: The calculation accounts for space size, local climate conditions, and building insulation quality.

3. Importance of Correct Sizing

Details: Properly sized heat pumps operate more efficiently, last longer, and provide better comfort. Undersized units struggle to maintain temperature, while oversized units short-cycle, reducing efficiency.

4. Using the Calculator

Tips: Measure your floor area accurately. Choose higher BTU factors for hotter climates (e.g., 35-40 for Queensland, 20-25 for Tasmania). Adjust insulation factor based on your home's insulation quality.

5. Frequently Asked Questions (FAQ)

Q1: Why is this important for Australian homes?
A: Australia's varied climates require careful sizing - from tropical north to temperate south.

Q2: How do I convert BTU to kW?
A: 1 kW ≈ 3412 BTU. The calculator shows both for convenience.

Q3: What's a typical BTU factor for my area?
A: Northern Australia: 35-40, Southern Australia: 25-30, Temperate zones: 30-35.

Q4: How does insulation affect sizing?
A: Well-insulated homes need 20% less capacity, while poor insulation may need 20% more.

Q5: Should I round up the calculated size?
A: Choose the nearest standard size, but avoid oversizing by more than 15%.

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