1. What is an Air Conditioner per Square Meter Calculator?

Definition: This calculator estimates the required cooling power (in kW) for an air conditioner based on room area and the unit's energy efficiency.

Purpose: It helps homeowners and HVAC professionals determine the appropriate AC capacity needed for a given space.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Cooling power (kilowatts)
• \( A_{room} \) — Room area (square meters)
• \( EER \) — Energy Efficiency Ratio (dimensionless)
• 44.6 — Conversion factor (W/m² to BTU/h·m²)
• 3412 — Conversion factor (BTU/h to kW)

Explanation: The formula converts the cooling load per square meter to the required AC capacity in kW, adjusted for the unit's efficiency.

3. Importance of Proper AC Sizing

Details: Correct AC sizing ensures energy efficiency, proper dehumidification, and prevents short cycling that can reduce equipment lifespan.

4. Using the Calculator

Tips: Enter the room area in square meters and the AC unit's EER (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 BTU/h) divided by power input (in watts) at a standard test condition.

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

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

Q4: What about insulation and windows?
A: This provides a baseline. Poor insulation or large windows may require 20-30% more capacity.

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