Duct exhaust fan - description, characteristics, advantages and disadvantages

A person spends most of his life indoors, so the air quality in the house should come first. Ventilation in the room is necessary to maintain stable humidity in the room, quickly eliminate unpleasant odors.

But the main function of the ventilation system is to eliminate pathogens., saw particles, 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 Is a complex of devices that are mounted from the ventilation shafts of the building. There are three types of such systems, which are distinguished by the type of section of the ventilation duct: round, square mixed type.

a brief description of

The exhaust duct fan system is very easy to install, it can be installed between a simple and a suspended ceiling, neatly covered with a decorative grill. That is why 80% of designers choose this type of ventilation when arranging the interior of a room.

Purpose

The main task of the duct fan for the hood is removal of excess moisture, harmful microorganisms and saws from the room. The issue of moisture is more related to rooms with high humidity - kitchen, bathroom. In addition to drying, the device is able to humidify the air in rooms.

The principle of operation in the duct ventilation system

The device operates as follows: through the duct-type air conditioner, which is the main part of the fan, air passes through the air that enters their premises 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 exhaust fans

The main difference between ductless ventilation and ducted ventilation is the absence of branched air ducts in the first network, due to which it does not require high electricity costs.

Ductless 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.

Advantages of a duct exhaust fan over other types

The ducted exhaust fan is the most popular type of ventilation used by private homeowners and businesses. It is not only easy to install, inexpensive and does not require special care, but also has other positive features.

Users choose ducted exhaust fans due to their high power, reliability and the 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 one when choosing a model, since it is necessary 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 unpleasant odors in multiple rooms

When arches are installed between rooms or doors are constantly open, a duct fan can purify 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 operate smoothly for 5-10 years in a row. So that the fan performs its functions 100% and harmful microorganisms do not return to the house after ventilation, it is necessary to clean the outer grille once a week, and completely change this grill once every 1-2 years to a new one.

Disadvantages of an exhaust duct fan

Any device, even such a simple one as a duct fan, has its drawbacks. Buyers who have been using devices of this type for more than one year, negatively describe the cumbersomeness, noise and complexity of installing the fan. But it all depends on the model, not every model has three drawbacks at once.

Bulkiness

Some outdated models of duct hoods have a bulky design that is difficult for a person to install without special skills. Therefore, when buying, it is better to choose compact, neat and lightweight models.

Noise

Most of the ventilation duct installations make noise during operation. This is often due to the air flow rate: the higher it is, the more noise the device emits when it is switched 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 higher, the noise is heard in the neighboring rooms.

Important! The noise level 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.

Complexity of installation

If a person has minimal knowledge of technology, then he can easily and quickly mount the fan into the exhaust shaft. The instructions indicate the sequence of actions to the smallest detail.

The only nuance that requires tremendous attention - the direction of the air flow, which is indicated by the arrow on the body. If you miss this moment and install the hood incorrectly, then instead of air from their premises, 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 you need. Firstwhat is worth considering is the shape of the ventilation duct in the house. If it is square, rectangular or rounded, then the fan should follow its shape.

Second indicator - ventilation process control system, which can be manual or automatic. The manual control system involves turning on and off the fan along with the light.

With an automatic system, the operation of the device is controlled remotely using a remote control. In some modern ducted exhaust fans, the speed of rotation of the blades is regulated.