1. What is an Air Conditioner Size Calculator?

Definition: This calculator estimates the required air conditioner size (in kW) based on room area and the unit's energy efficiency ratio (EER).

Purpose: It helps homeowners and HVAC professionals determine the appropriate AC capacity needed to effectively cool a space.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Required AC power (kilowatts)
• \( A_{room} \) — Room area (square meters)
• \( EER \) — Energy Efficiency Ratio (dimensionless)

Explanation: The formula converts the cooling load (based on room area) to kW while accounting for the unit's efficiency.

3. Importance of Proper AC Sizing

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

4. Using the Calculator

Tips: Enter the room area in square meters and the EER rating (default 3.5 for average 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 high-efficiency units can be 4.0+.

Q3: Does this account for room height?
A: This basic calculation assumes standard ceiling heights (2.4-2.7m). For higher ceilings, increase the area proportionally.

Q4: What about windows, insulation, or sunlight exposure?
A: For rooms with many windows or poor insulation, consider adding 10-20% to the calculated capacity.

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