Frequently Asked Questions
HVLS fan is a kind of fan that has a high volume at low speed. It means it can deliver a high volume of air by rotating at low speed. You have seen fans at your home, they provide air at a very high speed. But HVLS fans are special, they have the capability to provide a high volume of air at low speed. Therefore, they are named as HVLS (High Volume Low Speed). The reason behind is their size and aerodynamic design. These fans have large fan blades and the number of blades is almost twice the fan that you use at your home. There can be 6 blades or more in an HVLS fan. Moreover, the diameter of the fan can be up to 7.3m. These fans can be mounted on walls and ceilings according to the place and use.
There are a few reasons that make RTFANS HVLS large industrial ceiling fans better than the other fans. The reasons are,
Model Variations: There are five different models of RTFANS HVLS large industrial ceiling fans. They have a diameter from 24ft to 12ft. You have a choice to select any of them according to your use. You will not find these variations easily in the market. You can select the best one by considering the weight, rpm, diameter, airflow, and current of the fan. Thus, RTFANS has a variety of big industrial ceiling fans and our team can suggest the best option according to your place.
Strength and Durability of Fan: RTFANS are made from durable material that can ensure the strength of the fan. The chassis of the fan is made of imported aeronautic aluminium alloy (AA7075). It is forged by 1000T machine with 570MPa extension strength to provide good strength. The blades are also made of high strength aircraft aluminium alloy. So, we do not compromise on the strength of our huge industrial ceiling fans.
Zero Maintenance: There is no maintenance required over 20000 hours of operation. We use the “Shell” top class “Omala” S4 lubrication oil to provide the zero maintenance. Moreover, there is German “Simirit” double oil seal design to ensure no leakage, durability, and reliability.
Innovation: RTFANS’s unique double-layer chassis design makes dual protection to hold the heaviest motor part in the main structure, while other suppliers only have a single layer. We innovate things to make the quality better and reliable.
Considerate design: RTFANS adopts mortise and tenon structure with welding for the mainframe while other suppliers in the market use only welding to connect.
Bigger airflow: With leading R&D team for HVLS fans, RTFANS brings 20-30% higher air volume than other brands.
Modern Industrial Ceiling Fans: We have all modern designs of huge industrial ceiling fans to ensure the look and aesthetics of the area. All designs are according to modern standards. We use new, unique and reliable parts to ensure better performance. Further, the industrial and commercial ceiling fans are without lights to save energy.
Due to the above reasons, RTFANS are the best industrial ceiling fans and we provide our customers reliable, durable and cost-effective solutions.
More fan blade does not mean more air. It is a balance of total efficiency with consideration of noise level and air volume. You will not get much air if you cover most of the area or the whole area with blades. Such a fan will be useless. We have not just selected 6 blades for our fans, we have tried and tested everything on an experimental basis and then we came with the idea of 6 blades. It is the best possible option for high volume low speed (HVLS) fans.
Our first HVLS big industrial ceiling fans were made with 10 blades and then 8 blades as the second generation. Having 6 blades is the amendment as the 7th generation of our large industrial ceiling fans. We have tried to make our products cost-effective, efficient, better and durable. We are still trying to improve our fan design for better efficiency.
Creating a larger airfoil wasn’t simply the answer to improving efficiency. The airfoil must work efficiently through a range of speeds. When an HVLS fan rotates, the end of the blade moves faster than it does at its fixed point at the chassis, the fan blade angle also gives impact to airflow. While airflow patterns needed strong research and consideration. We did research and we are still trying to come up with innovative and effective ideas to make our fans the best industrial ceiling fans.
When engineers experimented with the airfoil shape, they discovered that a larger shape allowed them to reduce the number of blades. Final fan design decreased from 10 to 8 and then 6 blades, without a corresponding drop in fan performance.
Reducing the number of blades was proved to be beneficial. Moreover, it had also reduced the torque which increased the life span of the fan. A fan’s lifespan is related to torque:
Horsepower = Torque * Revolutions Per Minute (RPM) 5252
As RPM goes up, torque goes down for the same horsepower. Our engineers also found that, due to the longer airfoil shape, 6-blade HVLS fans rotate faster than 8 or 10-blade fans, which lowered the torque. Since torque is constant stress on a fan’s motor, bearings, and gear; therefore, less torque meant longer fan life.
Hence, 6 blades are for the best performance of our high volume low speed (HVLS) fans.
There are many companies that offer industrial ceiling fans for sale. But there are a few reasons that make RTFANS reliable and superior.
- We are Experts: RTFANS is the leading solution provider in China that has been focusing on air ventilation and cooling products and system since 2003. It has rich experiences in both products and systems. It can not only provide you with high-quality product and competitive HVLS fans prices but it also helps you to solve your problems. It helps you to meet your different requirements on ventilation and cooling, especially in large spaces.
- Excellent Market Reputation: RTFANS is the leading brand in China for high volume low speed (HVLS) fans and has a good reputation in the market. The first HVLS industrial ceiling fan was made by the RTFANS team in 2008. We have a strong technical support team and we are leading in HVLS fan R&D in China.
- Reliable Service: RTFANS provide you not only the product but also service including installation training and after-sales reliable service and guidance.
- Warranty: RTFANS gives lifetime warranty for its mechanical parts and 3 years warranty for its electrical parts to the large industrial HVLS fan products.
High volume low speed (HVLS) fans differ from traditional fans in many ways. Let’s discuss them one by one.
Number of Fans: For a large area you will need many traditional fans to cover the whole area while if you use high volume low speed (HVLS) fans, then you will need only a few units. For a 9000 sq. meter area you will need only 6 fans. To cover the same area with traditional fans you will require nearly 300 fans. So, you need a few units only to cover a large area if you go with High volume low speed (HVLS) fans.
Energy Consumption: Since to cover a large area, you need hundreds of fans; therefore, the total power consumption will be higher. The total power consumption can be 100 kW for a 9000 sq. meter area if you use traditional fans. In contrast, HVLS fans are few and they can do the work by consuming a few kilowatts only. Thus, HVLS fans save your energy and reduce your monthly bills.
Noise: Noise will be an issue with traditional fans. You will use hundreds of fans and the collective noise will be annoying and might be above 85 dB. So, it is better to use HVLS fans because they have low noise. RTFANS large industrial ceiling fans have a noise level of 43 only. Thus, they are very quiet.
Maintenance: Traditional fans require maintenance. They require frequent cleaning and maintenance. In contrast, HVLS fans require almost zero maintenance.
Life: The life of HVLS fans is much greater than traditional fans. They can work for more than 10 years if installed properly. While traditional fans have a maximum life of five years only.
Airflow: HVLS fans have an excellent airflow, they can provide air to every corner of the room. They provide a tridimensional natural breeze which keeps the air fresh and healthy. On the other hand, traditional fans have less volume airflow, which is not enough for the corners. Large leading-edge commercial and industrial ceiling fans can provide airflow of 13,500 cubic meter/minute that can cover a massive area of 1600 sq. meters.
For more information check RTFANS HVLS fans.
Yes, it is very expensive. Most HVLS fans are made in the USA and China. A few manufacturers in India produce HVLS fans. But almost all manufacturers do not have after-sales service. If the HVLS fan goes wrong, you have to think about the cost of maintenance. The fee of accessories, freight, and labour costs is too high. Although it is just a glitch, you may be lost a lot of money.
To save money, you should get high-quality HVLS fans from reliable manufacturers that can also provide after-sales services. This will make the maintenance work hassle-free and of low cost. If the company, outlet or repairing centre is in your country, then it would be more beneficial. RTFAN is a leading provider of all solutions of HVLS fans in china. You will also get reliable after-sales guidance as well.
There are High volume low speed (HVLS) fans available in the market with 3 blades. Due to the fewer number of blades, the cost of the fan is also less. The problem with such a design is low airflow. Such fans cannot provide a high volume of air at low speed as compared to fans with more blades. The number of blades plays an important role. It should be perfect to cover more area to provide excellent airflow at low speed.
RTFANS has done a lot of research on the number of blades. We have tested many ideas and finally, we came up with the idea of 6 blades. We found the best performance of HVLS fans in the case of 6 blades. This was our 7th amendment and we are still proud of it. 6 blades provide high volume airflow at low speed.
Yes, high volume low speed (HVLS) fans can help you in this regard. They can ventilate a very large area. If you are using air conditioners, then these fans can spread the air to every corner of the area. Moreover, it will also reduce the time of cooling; thus, it reduces your monthly bills. In normal temperature when you don’t need an air conditioner, you can use these fans to provide cool air. It can decrease the temperature of the area to a few degrees. Further, these large diameter commercial ceiling fans/industrial ceiling fans provide fresh and healthy air to the people.
RTFANS have a wide range of extra-large commercial and big industrial HVLS ceiling fans. You can get the best possible option according to the area. You can also get HVLS fans for the home to ventilate your rooms and big lounges. These fans can cover a large area at a very low running cost as compared to traditional fans.
It is better to have HVLS fans even if you have an excellent HVAC system. These fans assist your HVAC system and spread the cool air to every corner of the area. If you have HVLS fans, then there is no need to run the AC fully for a long time. You can increase the temperature and decrease the time of running because these fans help to spread the cool breeze quickly. You don’t need to waste energy and wait for a long time. Thus, you can easily save the running cost of your HVAC system, it will be reduced a lot. You can save up to 20% of power if you increase the temperature of the AC by 1˚C. Therefore, you can increase the temperature of your AC and allow fans to spread the air. It becomes more economical if you use an HVAC system with HVAC fans.
Moreover, you can also turn off the AC at normal temperature, the high volume low speed (HVLS) fans will keep the area cool and provide healthy and fresh air to people. These fans can also reduce humidity and odour.
Using the HVLS fan is a cost-effective and reliable solution for ventilation of large areas. You need to use fewer giant leading-edge industrial and commercial ceiling fans as compared to traditional powerful fans. The power consumption per unit area of HVLS fans is much lesser than other types of fans. It is because you only install a few units of HVLS fans for a large area. While there could be hundreds of units if you would have chosen other fans. Thus, HVLS fans use very less amount of electricity per unit area as compared to other fans.
From the table below you can analyze the number of RTFANS HVLS fans and other fans for a 9000 sq. meters area. There is a huge difference in number which creates a huge difference in power as well.
|Fan Diameter (m)||7.3|
|Air Flow (m³/min)||13,500(810,000)|
|Effective Area (m²)||1,500|
|Total Units installed||6|
|Total Kw Installed||9|
@10hrs/day @26 days/mth
Surprisingly, the airflow of HVLS fans and their covered area is also much greater than other hundreds of fans. Therefore, you get excellent air ventilation at a low cost. To save energy, get industrial and commercial ceiling fans without lights
There are different types of RTFANS HVLS fans such as,
- Extra-large industrial ceiling fans
- Extra-large commercial ceiling fans
- Commercial ceiling fans with remote control
- Industrial ceiling fans with remote control
- Commercial ceiling fans with lights
- HVLS fans for home (residential)
So, there can be different features and functions in HVLS fans. You can select anyone according to the area. You can contact us, and our team will assist you in selecting the best possible option. Further, there can be different sizes or diameters of fans, so it is better to consult and get a quote. Contact us today for assistance, we are ready to help you.
Yes, you can use high volume low speed (HVLS) fans to improve the air quality of your facility. Large HVLS industrial, commercial and residential fans can improve the air quality by reducing the humidity of the area. It spreads the dampness to provide comfort to people who are present or working in the area. Moreover, it can also distribute the odor and smoke present in the area to make air quality better. Thus, it provides healthy and fresh air to the people.
RTFANS-HVLS fans are capable of reducing the humidity of the area. They can reduce the humidity of the area up to 18%.
There are many companies that offer large or giant industrial ceiling fans for sale. But there are a few reasons that make RTFANS reliable and superior.
- We are Experts: RTFANS is the leading solution provider in China that has been focusing on air ventilation and cooling products and system since 2003. It has rich experiences in both products and systems. It can not only provide you with high-quality product and competitive HVLS fans prices but also can help you to solve your problems. It helps you to meet your different requirements on ventilation and cooling, especially in large areas.
- Excellent Market Reputation: RTFANS is the leading brand in China in high volume low speed (HVLS) fans and has a good reputation in the market. The first HVLS industrial ceiling fan was made by the RTFANS team in 2008. We have a strong technical support team and we are leading in HVLS fan R&D in China.
- Reliable Service: RTFANS provide you not only the product but also service including installation training and after-sales reliable service and guidance.
- Warranty: RTFANS give lifetime warranty for its mechanical parts and 3 years warranty for its electrical parts to the large industrial HVLS fan products. We provide heavy-duty industrial ceiling fans to ensure durability.
- Research and Development: Our research and development team works continuously throughout the year to make the best industrial, commercial and residential ceiling fans. We have patented and unique designs to provide better airflow and quality. We have six blades design for unbeatable airflow at low energy consumption per unit area. Our company also provides industrial and commercial ceiling fans with remote control. If the height of the ceiling is not much, then you can also get low profile industrial ceiling fans from us for garage and low height areas.
- Wide Range: We have large and extra-large industrial ceiling fans with different diameters and effective area. There are five different models, so you can select the best option for your area.
- Air Quality: Our large diameter industrial ceiling fans not only distribute the air, but they also improve the air quality of the place.
- No Maintenance: Our fans do not require maintenance, they are almost free of maintenance.
Yes, HVLS fans should have winglets. These are not for aesthetics, but they make the fan appealing as well. Their purpose is to improve aerodynamics. It helps to reduce turbulence. RTFANS all HVLS models have winglets to provide better performance. It also reduces energy loss and makes the fan more stable.
RTFANS HVLS fans have a warranty period of three years. We believe in customer satisfaction; therefore, we provide reliable warranty to our customers.
We provide everything including accessories. You will get the following things with each purchase.
- “Nord” motor
- 6 fan blades
- “DANFOSS” frequency converter
- Installation accessories
We have three main types of large HVLS ceiling fans which are,
The RTFANS industrial HVLS fans have five models of heavy-duty industrial ceiling fans. The diameter ranges from 3.7m to 7.3 meters. All models have different RPM, applicable area diameter, current, and weight. You can select large or extra-large industrial ceiling fans for your use. Our team will assist you in getting the right size.
Commercial HVLS fans have a diameter from 4m to 2.8m. These are available in four models.
PMSM fans have a diameter from 2.8m to 7.3m. There are six models from the applicable area of 400 to 1800 sq. meters.
If you have a large space and you want to make the performance of the air conditioner, air quality, and ventilation better, then you need HVLS fans. You can make the ventilation better, HVLS fans will send the cool air to every corner. They also make your HVAC system efficient by reducing the time of use. You will save your money in the end. You can also use these fans in the normal season when you don’t need AC, these fans can keep the area well- ventilated.
It is hard to place small fans in a big area, so the best option is HVLS fans. One fan can cover an area up to 1800 sq. meters depending on the size of the fan. Your workers or people at the place can easily do their work without any hassle. The will be happy with the healthy and fresh air.
If you are not sure whether you need to use HVLS fans or not, then you can contact us, and we will tell you everything according to the place. We are ready to assist you.
You can press the link to watch how to install the industrial ceiling fan. It is easy to install the HVLS ceiling fan by yourselves.
- Step 1: Clip-on any steel H-beam, without changing any steel structure.
- Step 2: RTFANS Cardan joint allows the fan to make free oscillation and find it’s level position no matter what the slope is.
- Step 3: Connect the ends of the extension rod with the Cardan joint and drive device by bolts.
- Step 4: The drive device has been assembled to be one unit before delivery, fix it to the extension rod by using bolts.
- Step 5: Please ensure the angle between each steel wire and the drive device is 45°, make sure the drive device of fan at a vertical level position.
- Step 6: Take the bottom cover close to the blade wheel and tighten it by bolts.
Traditional HVLS fans can’t be mounted outdoors, but the portable series can be. Moveable fans are indoor or outdoor flexible, they can be moved. They are suitable for outdoor and there is no fixed position in the work area. The area can be gardens, gyms, playgrounds and so on.
HVLS fans are high volume low-speed fans that mean, they can provide a high volume of air at very low speed. Thus, there is no need for a sprinkler system with these fans. They can provide enough ventilation and dehumidification to provide fresh and healthy air. Use RTFANS leading-edge commercial and industrial ceiling fans for ventilation.
Different series of HVLS fans require different mounting heights.
Giant Industrial Ceiling Fans: For these fans, the clearance from the roof to fan blade should be 1.2-3m with extension rob. The fan diameter is 3.7m(12’) to 7.3m(24’) and the clearance from floor to fan blade should be 5-9m.
PMSM series HVLS Fan: The clearance from the roof to the fan blade should be 0.5-2.5m with extension rob. The fan diameter is 3.7m(12’) to7.3m(24’) and the clearance from floor to fan must be blade 5-9m.
Big Commercial Ceiling Fans: The clearance from the roof to the fan blade must be 0.4-2.4m with extension rob. The fan diameter is 2.8m to 4.0m and the clearance from floor to fan blade should be 3-5m.
All the above conditions are the best installation heights.
As long as the building height is above 4.5 meters, it can be installed in steel structure, concrete structure, spherical grid structure or complex structure. There are no special requirements for the installation site, and the plant can be installed with or without driving. You can also get low profile industrial ceiling fans from RTFANS if you require for garage and other places.
You need to place the HVLS fans correctly whether you are using huge industrial or commercial ceiling fans. The placement of fans matters a lot to cover the whole area. You can install these fans at any place where minimum clearance is 4 meters. Our team representatives can help you place the fans in the right place. For lower height area, there are low profile industrial ceiling fans.
The size of the HVLS fans depends on the area. Our team representatives are ready to tell you the right sizes of fans you need for the best performance.
Yes, you HVLS fans can work in the existing building management system. You can also take help from our representative to ensure.
RTFANS leading-edge commercial and industrial ceiling fans are beneficial for other facilities as well. The facilities that are benefitted are,
HVAC Systems: HVLS fans assist your HVAC system. They can spread the air quickly in the whole area. You can also increase the temperature of your AC by a few degrees and reduce the running time by using such fans.
Dehumidification System: If you use the dehumidification system, then HVLS fans can also help it to reduce the humidity. These fans can distribute the air in the whole area and reduce the level of humidity up to 18%.
Heating System: HVLS fans can spread warm air in the area. They do it quickly and make the area warm and comfortable.