Home » News » Articles » What is the function of the exhaust fan?

What is the function of the exhaust fan?

Views: 0     Author: Site Editor     Publish Time: 2022-07-27      Origin: Site


facebook sharing button
twitter sharing button
line sharing button
wechat sharing button
linkedin sharing button
pinterest sharing button
whatsapp sharing button
sharethis sharing button

Exhaust fans, also known as negative pressure fans, negative pressure fans, etc., use air convection to keep the room in a negative pressure state all the time, forming a suction force, continuously inhaling outdoor air, and discharging indoor sultry air, thereby to achieve ventilation, cooling effect.

  • What is the function of the exhaust fan?

  • What should we pay attention to when installing the exhaust fan?

  • How to install the exhaust fan correctly

What is the function of the exhaust fan?

The exhaust fan is a type of axial flow fan. It is mainly used in negative pressure ventilation and cooling projects and is called industrial exhaust fan. The exhaust fan has the characteristics of large air duct, large fan blade diameter, large exhaust volume, ultra-low energy consumption, low speed and low noise.

Used together with the cooling water curtain, it can solve the problems of ventilation and cooling in one fell swoop. During the operation of the exhaust fan, a negative pressure environment will be formed in the room. If a cooling water curtain is installed on the other side wall of the air outlet of the exhaust fan, the exhaust fan will not only discharge the hot indoor air to the outside, but also suck the low-temperature air rich in water vapor into the room through the cooling water curtain. To achieve the effect of ventilation and cooling.

What should we pay attention to when installing the exhaust fan?

The installation of the exhaust fan must be reliable and firm, with a distance of more than 2.3m from the ground;

The distance between the exhaust fan and the roof must be more than 5CM;

Remember not to install the ceiling type in a place with a lot of oil smoke and dust, and leave the high temperature source;

The wall type with fan can not only be used for ventilation in various places, but also can be used for oil fume extraction;

Remind everyone that when using a socket for power supply, the power cord should be connected to a plug that meets safety standards;

The yellow-green bi-color wire in the power cord of the exhaust fan must be grounded;

The power supply of the exhaust fan should be connected to the omni-pole switch as much as possible.

How to install the exhaust fan correctly

There must be an inspection hole for the exhaust fan at the top of the ceiling;

Remind everyone to avoid the backflow of gas through open air passages and other pyrotechnic equipment passages;

Do not bend the exhaust fan's duct into a V-shaped, bell-shaped, etc. shape to obstruct the air circulation;

There must be other air intake holes in the room to ensure the entry of fresh air;

Do not spray water on the body during the operation of the exhaust fan;

The exhaust fan reminds the user that the power supply must be cut off when the exhaust fan is disassembled or cleaned. (Remember)

Over the past 50 years, Guangzhou Meihao HVAC Equipment Co. Ltd. has always adhered to the concept of quality first, and constantly researched, developed and innovated products in accordance with international standards and market needs.

NO.C105 Yuewang building, NO.1 Wangling section of 106 national road, Baiyun district








  • Professional after service

    With more than 50 years’ experience, we provide professional shipping service and after sales service including: booking vessel, protecting exclusive agency, trouble shooting, helping client with sales(such as making catalog), and so on.
  • Full access to market all over the world

    Our products have certification of CE, CB, ISO 9001, UL, RoHS, etc. Since 1969, our products have been sold to countries all over the world.  
  • Full ability to design and manufacture air curtains

    Our factory has experienced R&D team and full equipment to design and manufacture air curtains. We have well integrated production line which includes Metal workshop; Plastic workshop; Blower workshop; Motor workshop and Assembly workshop. These workshops are equipped with the most advance equipment and machines in our industry (including the laser cutting machine and numerical controlled machines for various purposes. Also we put in loads of efforts to make sure our customers have unique, original design. To make sure our customers always have the leading edge products in the business.
  • High standard quality control

    Our air curtains are with ISO 9001 certifications.
  • High quality products

    Our standard models are made better than international standards. For example our motor is made and designed by our R&D team, with full copper wire and temperature rise lower than most of others. That means our motor has longer service life. With professional design and manufacturing, our product air performance is at least 20% better than most of others.
  • Most complete product range of air curtain

    Our factory was found on 1969, started to design and manufacture air curtain since 1982.Our first air curtain model Classic C2. We are now having more the 50 air curtain product series, include:
    Ambient air curtain; Heating air curtain (electric heating and hot/warm water heating air curtain); Horizontal mount air curtain; Vertical mount air curtain; Ceiling mount air curtain; Special air curtain series. Such as vehicle air curtain which installed on refrigeration truck, revolving door air curtain, cold room air curtain, etc. Product length from 0.6 meters to 2 meter, if there’s special needs we can provide customize service for other length. And the air curtain casing materials include steel, stainless steel, plastic, aluminum, etc. 

Copyright   2021 Guangzhou Meihao HVAC Equipment Co. Ltd.    Sitemap   Support By Leadong.