Home Back

Aircon HP Based on Room Size

Aircon Horsepower Formula:

\[ HP = \frac{A_{room} \times 139}{2545 \times COP} \]

ft²

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is an Aircon HP Calculator?

Definition: This calculator estimates the required air conditioner horsepower based on room size and efficiency factor.

Purpose: It helps homeowners and HVAC professionals determine the appropriate air conditioner size for optimal cooling performance.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ HP = \frac{A_{room} \times 139}{2545 \times COP} \]

Where:

Explanation: The formula converts room size into cooling capacity requirements, adjusted by the system's efficiency.

3. Importance of Proper Aircon 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 feet and COP value (default 3.5 for standard units). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is COP in air conditioning?
A: COP (Coefficient of Performance) measures cooling efficiency - higher values mean more efficient systems.

Q2: What's a typical COP value?
A: Standard units have COP around 3.5, while high-efficiency models may reach 4.5-5.0.

Q3: How does room size affect HP requirements?
A: Larger rooms require more cooling capacity, but the relationship isn't strictly linear due to other factors.

Q4: What other factors affect aircon sizing?
A: Ceiling height, insulation, windows, climate, and heat-generating appliances all influence requirements.

Q5: Should I round up the calculated HP?
A: Yes, typically to the nearest standard unit size (0.75, 1.0, 1.5, 2.0 HP etc.).

Aircon HP Based on Room Size© - All Rights Reserved 2025