9/1/2025
The selection of industrial ceiling fans (HVLS fans) is related to ventilation and cooling efficiency, energy consumption and cost control. So how do you choose the right size of industrial large ceiling fan according to the size of the space? This article will provide a practical calculation formula
HVLS fans of different diameters have their applicable coverage area ranges. The following are common sizes of industrial ceiling fans and their coverage area references.
| Fan diameter (m) |
Recommended coverage area (square meters) |
Maximum air volume (m³/h) |
Typical power (kW) |
| 3.6 meters |
200-300 square meters |
8,500 |
0.5-0.8 |
| 5.5 meters |
400-600 square meters |
9,000 |
0.8-1.0 |
| 6.1 meters |
600-800 square meters |
12,900 |
1.0-1.2 |
| 7.3 meters |
900-1,500 square meters |
15,600 |
1.5 |
Please note that these coverage area data are based on ideal conditions of installation heights between 4 and 12 meters in a relatively open space. Actual coverage area will be affected by space height, obstacle layout, and ventilation requirements.
First, calculate the volume of the space that needs ventilation. The formula is: Volume (m³) = Length (m) × Width (m) × Height (m)
Different industrial environments have different requirements for air exchange rates:
Use the following formula to calculate the total required air volume: Required air volume (m³/h) = Room volume (m³) × Required air exchange rate.
Select the appropriate size and quantity of fans based on the required total air volume and fan performance parameters.
Suppose a factory building is 50 meters long, 30 meters wide, and 8 meters high, requiring six air exchanges per hour:
1. Calculate the volume of the space: 50 × 30 × 8 = 12,000 m³
2. Calculate the required airflow: 12,000 × 6 = 72,000 m³/h
3. Select a fan: If a 7.3-meter fan is used (each with a capacity of approximately 15,600 m³/h), then the number of fans required is: 72,000 ÷ 15,600 ≈ 4.6 → 5 fans
Q1: What are the sizes of large industrial ceiling fans?
Common diameters for large industrial ceiling fans (HVLS fans) include 3.6 meters, 5.5 meters, 6.1 meters, and 7.3 meters.
Q2: What height is required to install an HVLS fan?
The recommended installation height is between 4 and 12 meters.
Q3: How do I choose a fan size based on the area of my space?
Generally speaking, a 7.3-meter diameter fan covers approximately 900-1,500 square meters, a 6.1-meter fan covers 600-800 square meters, a 5.5-meter fan covers 400-600 square meters, and a 3.6-meter fan covers 200-300 square meters.