Ducted AC Size Calculator Australia

Ducted AC Size Equation:

\[ \text{Capacity (kW)} = \text{Area (m}^2\text{)} \times \text{Factor (W/m}^2\text{)} \div 1000 \]

Capacity (kW):

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1. What is the Ducted AC Size Calculator?

The Ducted AC Size Calculator estimates the appropriate air conditioning capacity needed for Australian homes based on room area and insulation factors. Proper sizing is crucial for energy efficiency and optimal cooling performance.

2. How Does the Calculator Work?

The calculator uses the equation:

\[ \text{Capacity (kW)} = \text{Area (m}^2\text{)} \times \text{Factor (W/m}^2\text{)} \div 1000 \]

Where:

\( \text{Area} \) — Room area in square meters
\( \text{Factor} \) — Cooling factor ranging from 125-145 W/m²

Explanation: The factor accounts for Australian climate conditions, insulation quality, and typical building materials. Higher factors are used for poorly insulated spaces or hotter regions.

3. Importance of Proper AC Sizing

Details: Correct AC sizing ensures energy efficiency, proper humidity control, longer system lifespan, and optimal comfort. Oversized units short cycle, while undersized units struggle to maintain temperature.

4. Using the Calculator

Tips: Measure your room area accurately. Choose factor based on insulation: 125 W/m² for well-insulated, 135 W/m² for average, 145 W/m² for poorly insulated spaces or north-facing rooms.

5. Frequently Asked Questions (FAQ)

Q1: Why is proper AC sizing important in Australia?
A: Australia's varied climate requires precise sizing to handle extreme temperatures while maintaining energy efficiency and comfort.

Q2: What factors affect the cooling load calculation?
A: Insulation, window size/direction, ceiling height, number of occupants, and heat-generating appliances all impact cooling requirements.

Q3: Should I consider zoning for ducted systems?
A: Yes, zoning different areas allows for better temperature control and energy savings by cooling only occupied spaces.

Q4: What about reverse cycle systems?
A: The same calculation applies for heating capacity, though heating factors may differ slightly from cooling factors.

Q5: Should I consult a professional?
A: While this calculator provides a good estimate, professional load calculation is recommended for exact sizing, especially for whole-house systems.