1. What is an Air Conditioner Size Calculator?

Definition: This calculator estimates the required air conditioner size in kilowatts (kW) based on room area and Energy Efficiency Ratio (EER).

Purpose: It helps homeowners and HVAC professionals determine the appropriate AC unit size for optimal cooling efficiency.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Air conditioner size (kilowatts)
• \( A_{room} \) — Room area (square meters)
• \( EER \) — Energy Efficiency Ratio (dimensionless)

Explanation: The formula converts British Thermal Units (BTUs) to kilowatts, accounting for room size and the AC unit's efficiency.

3. Importance of Proper AC Sizing

Details: Correct sizing ensures energy efficiency, proper humidity control, and prevents short-cycling of the unit.

4. Using the Calculator

Tips: Enter the room area in square meters and the EER rating (default 3.5). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is EER?
A: Energy Efficiency Ratio is the cooling capacity (in BTUs) divided by power input (in watts) at a specific temperature.

Q2: What's a typical EER rating?
A: Standard units range from 8-12 EER, while high-efficiency units can reach 12+ EER.

Q3: Why is room area important?
A: Larger rooms require more cooling capacity to maintain comfortable temperatures.

Q4: Should I consider other factors?
A: Yes, also consider ceiling height, insulation, windows, and climate for more precise sizing.

Q5: How do I convert kW to BTU?
A: Multiply kW by 3412 to get BTU/hr (1 kW = 3412 BTU/hr).