1. What is an Air Con Heat Load Calculator?

Definition: This calculator estimates the cooling capacity needed for an air conditioner based on room size and energy efficiency rating.

Purpose: It helps HVAC professionals and homeowners determine the appropriate air conditioner size for a given space.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The formula converts room area to cooling capacity requirements while accounting for the air conditioner's efficiency.

3. Importance of Heat Load Calculation

Details: Proper heat load estimation ensures efficient cooling, prevents undersized/oversized units, and optimizes energy consumption.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is EER?
A: Energy Efficiency Ratio is the cooling capacity (BTU/hr) divided by power input (watts). Higher EER means more efficient.

Q2: What's a typical EER rating?
A: Standard units range 8-12 EER (2.3-3.5 in this formula's units), while high-efficiency units can reach 14+ EER (4.1+).

Q3: Does this account for other heat sources?
A: This is a basic calculation. For rooms with significant heat sources (appliances, sunlight), add 10-20% to the result.

Q4: How does ceiling height affect this?
A: For ceilings over 2.7m, multiply the area by (actual height/2.7) before calculation.

Q5: What about insulation quality?
A: Poor insulation may require 20-30% more capacity, while excellent insulation may need 10-15% less.