7/25/2025
If the wrong size of ceiling fan is chosen, the ventilation effect will not be adequate, and the electricity bill will be higher. Therefore, choosing the right size of ceiling fan for the factory is a topic that every factory owner cannot avoid.
Faced with the HVLS FAN on the market ranging from 2.5 meters to 7.3 meters or even larger, many factory decision makers are in a dilemma. This article will comprehensively analyze the key factors for choosing HVLS FAN in industrial environments, helping you make accurate choices based on the actual situation of the factory.
HVLS is the abbreviation of High Volume, Low Speed. HVLS FAN uses blades with a diameter of 2.5 meters to 7.3 meters or even larger to slowly rotate, pushing a large amount of air to form a continuous natural breeze.
Its core advantage is that the extremely low speed (usually 60 rpm) generates all-round airflow in vertical and horizontal directions, effectively solving the common temperature stratification problem in large spaces: hot air rises and gathers on the roof, while people on the ground cannot feel the ventilation effect.
A 7.3-meter-diameter HVLS FAN can cover an area of up to 2,000 square meters, and its maximum power consumption is only equivalent to that of several traditional industrial fans. This high-efficiency coverage capability and energy-cost-effectiveness make HVLS FAN the preferred solution for ventilation and cooling in modern factories, logistics warehouses and large venues.
Safety regulations require that all HVLS FAN blades must be at least 3.05 meters (10 feet) above the ground. In actual operation:
Large plants over 8 meters high: most suitable for HVLS FANs with a diameter of 7.3 meters or more
The blade end must maintain a safety distance of at least 0.9 meters (3 feet) from any obstacles (including lamps, pipes, equipment).
The coverage capabilities of HVLS FANs of different sizes vary greatly:
3m diameter: covers approximately 400600㎡
4.2m diameter: covers approximately 8001000㎡
7.3m diameter: single unit covers up to 2000㎡
16 feet (about 4.9 meters): maximum coverage is 7500 square feet (about 696㎡)
Assembly workshop/electronics workshop: requires gentle breeze (12m/s), choose models with patented silent tail design, such as Cortecfan's Frigga series
Warehouse/logistics center: focus on air circulation and moisture prevention, medium wind speed (23m/s) is more suitable
Casting/heat treatment workshop: requires higher wind speed (3m/s or more) to dissipate high temperature and smoke
High temperature and dusty environment: select motors with IP55 protection level or above, dustproof and waterproof
Corrosive environment: select models with all-aluminum body and blades
Inflammable and explosive places: special HVLS FAN that meets explosion-proof standards is required
3. Detailed explanation of performance parameters of HVLS FAN of different sizes
| Fan diameter |
Coverage area |
Maximum power consumption |
Applicable plant height |
Typical application scenarios |
| 3 m |
400-600㎡ |
0.4kW |
4-5 m |
Small workshop, maintenance center |
| 4.2 m |
800-1000㎡ |
0.75kW |
5-7 m |
Medium-sized assembly plant, storage center |
| 7.3 m |
2000㎡ |
1.5kW |
More than 8 m |
Large manufacturing workshop, logistics center |
| 4.9 m |
696㎡ |
0.8kW |
6-8 m |
Stadium, medium warehouse |
Modern HVLS FAN is mostly equipped with a variable frequency controller, which can automatically adjust the wind speed according to the temperature.
One-piece hanger: avoids the risk of welding point breakage
Double safety steel cable: upper and lower double protection ensures structural stability
Million times fatigue test: The blade frame is strictly tested to prevent long-term use breakage
High-end HVLS FAN should have winter reversal function
Key installation requirements
Roof slope adaptability: Different slopes require different extension mounting parts. For example, a 7.3-meter fan on a 4/12 slope roof requires a 3-foot extension pipe
HVAC equipment spacing: When the fan is installed above the HVAC equipment, a gap of at least 1 fan diameter is required; when it is installed below, a gap of at least 2 diameters is required
Structural strength verification: The load-bearing capacity of the roof structure must be evaluated by a professional engineer
Professional maintenance plan
Oil-free design: The use of permanent magnet brushless motors (such as Vans Intelligent Technology products) can eliminate the need for regular oil changes and maintenance
Annual inspection items: including structural connection inspection, motor performance test and safety cable status assessment
Before investing, be sure to conduct professional on-site assessment and airflow simulation. High-quality suppliers such as CortecFan provide airflow simulation operation services. A properly selected and installed HVLS FAN can not only operate safely for 20 years, but also recover its cost through energy-saving benefits within 2-3 years, becoming a key equipment for sustainable factory operations.
Q1: What is the essential difference between HVLS FAN and traditional industrial fans?
HVLS FAN (high volume low speed fan) uses large blades to rotate at low speed to push a large amount of air to form a natural breeze, solving the problem of spatial temperature stratification. Traditional industrial fans are small in size and high in speed, which produce local strong winds, cannot achieve all-round air circulation, and have higher energy consumption.
Q2: How much area can a 7.3m HVLS FAN cover?
A high-quality HVLS FAN with a diameter of 7.3m can effectively cover an area of 2,000 square meters, equivalent to the size of 5 standard basketball courts. Its maximum power is only about 1.5kW, which is much lower than the energy consumption of multiple small fans combined.
Q3: Can HVLS FAN really reduce the body's perceived temperature?
Yes, by accelerating the evaporation of human sweat through continuous and gentle natural wind, HVLS FAN can reduce the body's perceived temperature by 38°C. The specific effect depends on the ambient humidity and wind speed setting.