What are the advantages and disadvantages of exhaust fans?

Exhaust fan is a common ventilation device, usually used for indoor air circulation and ventilation. The following are the advantages and disadvantages of exhaust fans:
advantage:
Good ventilation and air exchange effect
Exhaust fans can effectively expel polluted indoor air while introducing fresh outdoor air, improving air quality, especially suitable for places such as kitchens and bathrooms that are prone to odors and humidity.
Relatively low price
The price of exhaust fans is usually affordable, and compared to some complex ventilation systems or air purification equipment, their cost-effectiveness is high, suitable for ordinary households and small places to use.
Easy to install
The installation of the exhaust fan is relatively simple. Generally, only a hole needs to be opened in the wall or window, and then the exhaust fan can be fixedly installed. For some places without complex ventilation systems, exhaust fans are a quick and effective solution.
Low energy consumption
The power of the exhaust fan is generally small, and it consumes little electricity during operation. Long term use will not increase the burden of electricity bills too much.
Relatively low noise
Modern exhaust fans have undergone many noise reduction treatments in their design, resulting in relatively low noise levels during operation and not causing too much interference to daily life and work.
Wide applicability
Exhaust fans can be used not only in home environments, but also in offices, warehouses, workshops, and other places to meet various ventilation needs.
Disadvantages:
Limited ventilation capacity
The ventilation volume of the exhaust fan is relatively small, and for places with large areas or high ventilation requirements, it may not be able to meet the complete ventilation needs. For example, in large commercial spaces or industrial plants, a more powerful ventilation system may be required.
Greatly affected by the environment
The ventilation effect of the exhaust fan will be affected by the outdoor environment. If the outdoor air quality is poor (such as haze, odors, etc.), the exhaust fan may introduce these pollutants into the room. In addition, if the outdoor wind is strong, it may lead to a decrease in the ventilation efficiency of the exhaust fan.
Installation location is limited
Exhaust fans need to be installed in areas with exterior walls or windows to expel air outdoors. If the room does not have a suitable installation location, it may not be usable.
Single appearance design
The appearance design of the exhaust fan is relatively simple and may not match well with some modern decoration styles. Although some styles have been improved in design, the overall selection is still limited.
Regular maintenance is required
During the use of exhaust fans, the fan blades and filter screens are prone to accumulate dust and dirt, requiring regular cleaning and maintenance, otherwise it will affect the ventilation effect and service life.
Unable to filter air
The main function of an exhaust fan is ventilation and air exchange, and it cannot filter out particles, bacteria, or harmful gases in the air like an air purifier. If air purification is required, additional air purification equipment is also needed.
Summary:
Exhaust fan is an economical and practical ventilation device, suitable for places with low ventilation requirements such as homes and small offices. But if more efficient ventilation or air purification functions are needed, other equipment or systems may need to be considered.