Home Back

Aircon Horsepower per Floor Area

Aircon HP Formula:

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

ft²

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is an Aircon Horsepower Calculator?

Definition: This calculator estimates the required air conditioning horsepower based on room area and the unit's coefficient of performance.

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

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 area into cooling requirements while accounting for the air conditioner's efficiency.

3. Importance of Proper Aircon Sizing

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

4. Using the Calculator

Tips: Enter the room area in square feet and the COP (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 units.

Q2: What's a typical COP value?
A: Modern units range from 3.0 to 4.0. Check your unit's specifications for exact values.

Q3: How does room size affect HP requirements?
A: Larger rooms require more cooling power, 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, air conditioners come in standard sizes (0.75HP, 1HP, 1.5HP, etc.), so round up to the nearest available size.

Aircon Horsepower per Floor Area© - All Rights Reserved 2025