An air handling unit or an AHU is a machine that primarily ensures adequate circulation and distribution of air throughout a specified area. It is a component of heat, ventilation and air conditioning (HVAC) systems. AHUs are primarily used in commercial premises and industrial establishments. AHUs are generally situated on the roof, floor or in the basement of buildings. They cater to pre-specified sectors or areas; thus, one usually finds several AHUs in an establishment. Air handling units have extensive functions and advantages. They are vital in ensuring an ideal work environment and high productivity.
What is the role of an AHU?
Air handling units have comprehensive functions. They are responsible for complete climate control of the designated zone. This entails taking care of the following parameters:
Filtration: One of the prominent roles of AHUs is the purification of air. For this purpose, filters are instated within AHUs. These filters weed out pollutants and contaminants from the air, thus ensuring a clean and hygienic working environment. Filters are of different types and cater to varied requirements. For example, bag filters are used for medium-high efficiency, HEPA filters are used to guarantee maximum sanitation, etc.
Circulation : Another critical role of an AHU is to ensure proper ventilation of air. To carry out this function, air handling units are fitted with fans. They facilitate the passage of air and manage the distribution of air throughout the physical space.
Humidification : It is important to regulate humidity levels if the external environment is humid or hot air is being gushed out into cold surroundings during the winter season. If humidity levels are not appropriately controlled, the air becomes dry and may interfere with routine functioning within the building. Different kinds of humidifiers are available to suit the individual needs of each region, for example, steam grid humidifiers, spray type humidifiers etc.
Temperature Control : AHUs help maintain the required temperature. To achieve this, they monitor and adjust room air conditioners.
How Does an AHU work?
Air handlers are composed of 3 principal constituents, which are:
Air Filters : The air being brought in is thoroughly filtered. This is done to remove all potential contaminants. This step is crucial to avert the possibility of particle build up in machines. If precautions are not taken, this may cause equipment malfunction and also lower energy efficiency.
Fans : The purpose of the fans is to circulate air through the air handling unit. They are also known as blowers. Generally, the fans used in AHUs are centrifugal fans. Centrifugal fans or squirrel cage fans can dispense air quickly all over a confined space by creating high air pressure. Large-scale AHUs may also have an additional return air fan which helps in this process.
Heat Exchanger Coils : Air handler coils condition the air that it distributes. Depending on the set point temperature, these coils either heat or cool the air. If the air is cooler than the set point temperature, the heating coil will heat up to make the air warmer until it reaches the required temperature. If the air is on the hotter side, the cooling coil operates to reduce heat and lower air temperature.
Air handling units thus help maintain a comfortable and fresh indoor environment. They blend and circulate air from the exterior environment to the interior environment. AHUs play a key role in ensuring clean and ideal operating conditions. Schneider Electric offers a wide variety of high-quality AHU systems, rfid system, made with the latest innovative technology to suit your needs. For more information, visit the #SchneiderElectricIndia website today!
