If you understand the main difference between low-speed and high-speed air curtains are their airflow speed and use. Low-speed air curtains are best for an indoor environment, such as in a house. On the other hand, High-speed air curtains are used in industrial or commercial sectors that need substantial air barriers to block dust, insects, and outside air.
It has differences in quality and product prices; high-speed air curtains are higher in price than low-speed air curtains. Your demand needs to buy what is best for you: light use or heavy use.
Understanding the Air Curtains
Air Curtains are used in hot and humid weather places to keep rooms calm and clean for homes, offices, and businesses. An air curtain can help save energy and keep indoor air fresh with an invisible air barrier. Bangladesh is a hot and humid place, so there is are need to use the best Air Curtain in Bangladesh.
Most of the buyers ask me, “What is the difference between low-speed and high-speed air curtains?” It helps the customer to know about these to choose the right product.
I can suggest from my experience that I have installed and serviced many air curtains from brands like National Air Curtain, Gree Air Curtain, and KDK Air Curtain. Here are simple explanations of how they are different.
What Is an Air Curtain and How Does It Work?
An air curtain is an electric device that is placed above the doorway that blows air downward across the opening. This fast-moving air creates an air barrier between indoor and outdoor air to help keep the area cool, clean, and comfortable.
It doesn’t physically block the doorway. Instead, it creates an invisible air barrier that keeps out heat, dust, smoke, and insects while allowing people and goods to pass through easily. This is most effective for good weather in your indoor space.
Working Principle:
1. The motor draws the air above the door.
2. It drives the air via a high-speed fan system.
3. A continuous airflow curtain is a nozzle through which the air escapes.
4. The air flow is adequate for the separation of indoor and outdoor.
Difference between Low-Speed and High-Speed Air Curtains
We are closely discussing here what the difference is between low-speed and high-speed air curtains.
1. Air Velocity (Speed of Airflow)
Low-Speed Air Curtains:
They work at a speed of 5–8 meters per second. The airflow is soft and light for keeping cool air inside in home.
High-Speed Air Curtains:
They work at a speed of 10–20 meters per second or more. The strong airflow blocks outside wind, insects, and hot air from entering.
2. Application Area
Low-Speed Models:
Best for offices, restaurants, homes, hospitals, and small shops where the goal is to keep cool air inside and warm air outside.
High-Speed Models:
Best for factories, warehouses, cold storage, shopping-mall and large buildings with frequent movement of people, machines, or goods.
3. Door Height and Width Compatibility
Low-Speed Air Curtains:
Suitable for doors up to 2.5 meters high.
High-Speed Air Curtains:
Can effectively cover entrances up to 3.5–5 meters high or more.
4. Energy Efficiency
Low-Speed Units:
Use less electricity because the fan runs at a lower speed.
High-Speed Units:
Use more electricity than a low-speed air curtain. It can save energy overall use of a high-speed air curtain.
5. Noise Level
Low-Speed:
Works quietly; it is perfect for homes, offices, and small shops.
High-Speed:
A bit louder because of the strong airflow, but the noise level is acceptable for industrial areas.
6. Cost of Air Curtain in BD
Low-Speed Air Curtains: More affordable and cost-effective for small spaces.
High-Speed Air Curtains: Higher than low-speed items for powerful motors and heavy-duty components.
Low-Speed vs High-Speed Air Curtains
| Feature | Low-Speed Air Curtain | High-Speed Air Curtain |
| Air Velocity | 5–8 m/s | 10–20+ m/s |
| Door Height | Up to 2.5 m | Up to 5 m |
| Best For | Homes, offices, restaurants | Factories, warehouses, malls |
| Noise Level | Very low | Moderate |
| Power Consumption | Low | Medium to high |
| Cost | Budget-friendly | Premium range |
| Installation Type | Light-duty | Heavy-duty |
| Function | Maintain temperature separation | Block dust, insects, outdoor air |
When to Choose a Low-Speed Air Curtain
Low-speed air curtain depends on some things, if:
- You want to keep indoor cooling efficient.
- The doorway is small or medium (less than 2.5 meters).
- You run offices, restaurants, or showrooms with light traffic.
- You need a quiet environment for customer comfort.
- You want to save energy while keeping the AC effective.
If you live in Dhaka, you can use a low-speed air curtain in a boutique house, coffee shop, or pharmacy to keep the weather reasonable in your indoor space.
When to Choose a High-Speed Air Curtain
For a high-speed air curtain, choose if:
- The doorway is taller than 3 meters.
- The area has heavy traffic or wide entrances.
- You need to block dust, insects, or hot air effectively.
- You work in factories, warehouses, supermarkets, or other commercial spaces.
- You need strong airflow to maintain different temperature zones, like in cold storage or kitchens.
If you work in Gazipur, Narayangong, or Chittagong, here you should use a high-speed air curtain to keep out dust, insects, and hot air.
Benefits of Using the Right Air Curtain in Bangladesh
Low-speed or high-speed air curtains can provide many benefits:
Energy Savings:
- It can save your money through energy savings.
Hygiene & Cleanliness:
- Stops insects, dust, and polluted air from entering.
Comfort Maintenance:
- Keeps indoor temperature steady and improves comfort.
Reduced AC Load:
- The air conditioner works less to maintain the desired temperature.
Improved Air Quality:
- It can improve the indoor air quality.
Pros and Cons of Low-Speed and High-Speed Air Curtains
Low-Speed Air Curtains
Pros:
- Quiet operation
- Energy-efficient
- Affordable
- Perfect for small doors
- Easy to install and maintain
Cons:
- Not effective for tall or open doors
- Weak resistance against outdoor wind or insects
High-Speed Air Curtains
Pros:
- Strong air barrier
- Effective against dust, smoke, and insects
- Ideal for industrial/commercial use
- Improves indoor air control
Cons:
- Higher energy consumption
- Louder operation
- More expensive
Choosing the Right Air Curtain for Your Business
When you decide between low-speed and high-speed air curtains, consider:
- Door height and width.
- Location (facing indoors or outdoors).
- Traffic type (people or vehicles).
- Purpose (cooling, blocking insects, or both).
- Budget and energy-saving goals.
If you are not sure which is the best Air Curtain in Bangladesh, you can ask a professional HVAC engineer. I always check airflow needs, installation height, and the environment before recommending a model.
Finally: Which Air Curtain Should You Choose?
There are differences between low-speed and high-speed air curtains in their airflow and use.
- Low-speed air curtains are quiet and save energy. It works best in small rooms.
- High-speed air curtains are stronger and it used for big entrances, shops, or factories where doors open often.
You have to choose the right or best Air curtain in Bangladesh to keep the room cool. Clean and energy efficient, which is very useful in hot climate areas. For the best result, you can get help from an HVAC engineer or expert for installation and service.