1. What is an Air Conditioner Size Calculator?

Definition: This calculator estimates the required air conditioner size in kilowatts based on room area and energy efficiency ratio.

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 while accounting for the cooling efficiency of the unit.

3. Importance of Proper AC Sizing

Details: Correct sizing ensures energy efficiency, proper humidity control, and prevents short cycling or insufficient cooling.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is EER and where do I find it?
A: EER (Energy Efficiency Ratio) is the cooling capacity divided by power input. It's listed on the AC unit's specifications.

Q2: What's a typical EER value?
A: Standard units range from 3.0-3.5, while energy-efficient models can reach 4.0-5.0 or higher.

Q3: Does this account for room height?
A: This basic calculation assumes standard ceiling heights (2.4-3m). For higher ceilings, multiply area by height factor.

Q4: What about windows or insulation quality?
A: For sun-facing rooms or poor insulation, consider adding 10-20% to the calculated capacity.

Q5: How does this convert to BTU/h?
A: Multiply kW result by 3412 to get BTU/h equivalent.