A person spends most of his life indoors, so the air quality in the house should be in the first place. Indoor ventilation is necessary to maintain stable humidity in the room, quickly eliminate unpleasant odors.
But the main function of the ventilation system is the elimination of pathogensparticles of saw, which, getting into the respiratory tract of a person, cause allergic reactions and other serious diseases.
What is a duct exhaust fan?
Exhaust duct ventilation - This is a set of devices that are mounted with the ventilation shafts of the building. There are three types of such systems that distinguish by the type of section of the ventilation duct: round, square, mixed type.
A brief description of
The duct exhaust fan system is very easy to install, it can be installed between a simple and a false ceiling, carefully covering it with a decorative grille. That is why designers in 80% choose this type of ventilation when arranging the interior of the room.
Destination
The main task of the duct fan for the hood is removal of excess moisture, harmful microorganisms and saws from the premises. The issue of moisture is more relevant to rooms with high humidity - kitchen, bathroom. In addition to drying, the device is able to humidify the air in the rooms.
The principle of operation in the duct ventilation system
The device operates as follows: through the channel-type air conditioner, which is the main part of the fan, air passes through their room through a special grill.
The air conditioner has a filter through which the air is cleaned, cooled and returned back to the room. As a result, a healthy microclimate is formed.
Differences from ductless fans for hoods
The main difference between channel-free ventilation and channel ventilation is the absence of branched air outlets in the first network, so it does not require high electricity costs.
Channelless ventilation systems are installed above the roof of a ventilated building, sometimes in window openings. Duct fans are mounted in the ventilation shaft of the house.
The advantages of a duct fan for drawing over other varieties
Duct exhaust fan is the most popular type of ventilation used by private homeowners and enterprises. It is not only easy to install, inexpensive and does not require special care, but is also characterized by other positive features.
Users choose duct fans for exhaust due to high power, reliability and ability to eliminate unpleasant odors in several rooms at once.
Power
The higher the power of the device, the higher its performance. This indicator is considered the main when choosing a model, since you need to determine the power based on the area of the room. By dividing the power of the device by the area of the room, you can also calculate the maximum air flow.
Ability to eliminate odors in several rooms
When arches are installed between the rooms or the doors are constantly open, the duct fan can clean the air throughout the house. If you plan to use the device for air purification in several rooms at once, then its power should be at least 40-50 watts.
Reliability
For a low price, owners of private houses and apartments receive a reliable and durable device. The system can run smoothly for 5-10 years in a row. In order for the fan to perform its functions 100% and harmful microorganisms do not return to the house after ventilation, it is necessary to clean the external grill once a week, and once every 1-2 years completely replace this grill with a new one.
Disadvantages of exhaust duct fan
Any device, even as simple as a duct fan, has its drawbacks. Customers who have been using devices of this kind for more than one year describe on the negative side the bulkiness, noise, and complexity of installing a fan. But it all depends on the model, not every model has three shortcomings at once.
Bulkiness
Some outdated models of duct hoods have a bulky design that is difficult to mount to a person without special skills. Therefore, when buying, it is better to choose compact, neat and lightweight models.
Noise
Most ventilation duct installations make noise during operation. Often this is due to the speed of the air flow: the higher it is, the more noise the device emits when turned on. Experts recommend buying fans with an air flow rate of 11-14 m / s. When the indicator is lower, the air is poorly cleaned; when it is higher, noise is heard in neighboring rooms.
Important! Noisiness directly depends on the impeller blades. If they are bent forward, the prior will create a lot of noise, if backward, ventilation will be silent.
Installation complexity
If a person has minimal knowledge of technology, then he quickly and easily mounts a fan in an exhaust shaft. The instructions indicate the sequence of actions to the smallest detail.
The only nuance that requires great attention - the direction of the air flow, which is indicated by the arrow on the body. If you miss this point and install the hood incorrectly, then instead of the air in their room, it will filter the air from the ventilation shaft.
Factors that determine the choice of fan diameter
Before you buy a fan, you need to determine what kind of device is needed. First, which is worth considering - the shape of the ventilation duct in the house. If it is square, rectangular or rounded, then the fan should repeat its shape.
Second indicator - A ventilation process control system that can be manual or automatic. Manual adjustment system involves turning the fan on and off with the light.
With an automatic system, the operation of the device is remotely controlled using the remote control. Some modern duct exhaust fans control the speed of the blades.
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