A ventilation unit is part of a system consisting of channels and ducts, elements for forcing and venting air from rooms. The calling of such units is the provision of healthy conditions for staying in residential, industrial, administrative, and other buildings.
Operating principle
The forced-air
ventilation unit forces the air into the room. In the process, the system simultaneously saves space from dust and toxins, and also heats it to a comfortable temperature.
The air that enters the duct is treated, moving through separate filters with varying degrees of purification. The quality of the output stream can be changed by the user depending on the required parameters.
The forced-air ventilation unit creates high pressure areas, as a result of which the exhaust air systematically leaves the room. The output is through the system shafts.
Air handling unit diagram
To better understand the principle of the system, it is necessary to consider the scheme of air flow :
- The red marker is air that must be worked out;
- Blue marker - incoming and cleared;
- Yellow - exhaust air going out.
Device
The device of the air handling unit is as follows:
- Air valve - provides fresh air to the system.
- Filters - clean the space from unpleasant odors, contaminants and toxic substances. The quality of air purification depends on their nature.
- Heaters - heat the air at the system inlet to the set temperature. They can be water or electric.
- The fan is the main functional element of the installation, which is responsible for the intake of air from the outside.
- Noise suppressors - reduce the level of vibration that system elements create to the highest possible level.
Application
The characteristics of a ventilation unit of supply type contribute to its operation in the premises of almost any purpose, from residential to industrial. Effective forced air exchange allows residents and staff to feel comfortable and feel good throughout the day.
Almost every modern ventilation unit is capable of:
- Effectively clean the space from dust, cigarette smoke, exhaust gases.
- Regulate air humidity.
- Control and change the temperature of the space.
Supply units are indispensable in facilities with a large concentration of personnel. It is in such places that the shortage of fresh air is most acute. Installation of such systems meets the requirements of modern safety standards. According to them, the air in public buildings should be completely updated at least every hour.
Features of choice
Influx units must be selected not only based on the available budget, but also according to functionality, based on the parameters of power supply, data on the air environment, the number of people in the room.
An important criterion is the purpose of the room. So, if it is necessary to maintain an industrial facility, the first place is taken by the performance indicators of technological equipment, which is reflected in the necessary air exchange rate.
Advantages and disadvantages
Modern
air handling units of ventilation systems are equipped with efficient automation, which maintains the specified airspace indicators at a stable level.
Due to the effect of heat recovery, units of this category demonstrate economical energy consumption when establishing comfortable indoor conditions. The installation of the supply air unit is guaranteed to ensure the outflow of recycled air and its intake.
Despite the obvious advantages, air handling units have some drawbacks. Here it is worth noting certain difficulties that arise during the development and installation of the system with dense residential development. Most often, the problems are the lack of free space for the installation in accordance with safety standards and regulations.
In the process, the supply units create a noticeable vibration, which leads to the occurrence of certain noise effects, causing discomfort to people nearby. Eliminating inconvenience requires additional costs for the installation of insulating materials, such as laying fiberglass, lamella mats, bitoplast. Such events are quite expensive.
Eventually
In the rapid whirlpool of life in large cities, quite often a person does not have the opportunity to enjoy enough clean, fresh air in the premises. The problem is solved by the installation of air handling units. Modern functional systems ensure the establishment of a healthy microclimate in both residential and public buildings through forced air renewal.