1. What is an Air Conditioning Calculator kW?

Definition: This calculator estimates the required cooling power (in kW) for an air conditioning system based on room size and energy efficiency.

Purpose: It helps homeowners, HVAC professionals, and designers determine the appropriate AC capacity 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 (typically 3-5)
• 44.6 — Conversion factor (W/m² to BTU/h)
• 3412 — Conversion factor (BTU/h to kW)

Explanation: The formula converts room area to cooling load in BTU/h, then to kW while accounting for the AC unit's efficiency.

3. Importance of Proper AC Sizing

Details: Correct kW calculation ensures energy efficiency, proper cooling, and prevents system overwork or short-cycling.

4. Using the Calculator

Tips: Enter the room area in square meters and the EER (default 3.21). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is EER?
A: Energy Efficiency Ratio measures cooling output (BTU/h) divided by power input (W). Higher EER means better efficiency.

Q2: What's a typical EER value?
A: Standard units range from 3-5, with energy-efficient models reaching 8-12.

Q3: Why 44.6 in the formula?
A: This converts square meters to BTU/h cooling load (approximately 125 BTU/h per m²).

Q4: How accurate is this calculation?
A: It provides a basic estimate. For precise sizing, consider insulation, windows, occupancy, and climate.

Q5: Should I round up the kW result?
A: Yes, round up to the nearest standard AC unit size (e.g., 2.5kW, 3.5kW, 5kW).