Hygienic air handling unit

Many people may not be familiar with the term hygienic air handling unit or may be looking for more information about it. Therefore, in this article, we have decided to provide a complete description of the components, operation, and features of the hygienic air handling unit in order to know what type of air handling unit it is, what features it has, and what standards were considered in its design and construction.

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What is a hygienic air handling unit?

The hygienic air handling unit is structurally very similar to a normal air handling unit, with the difference that it is manufactured to clean 99.99% of any air pollution entering the room using special filtration and more advanced sealing.
Hygienic air handling units are widely used as air handling units for hospitals, laboratories, pharmaceutical companies, food industries, clean rooms, data centers, aerospace industries, electronic and semiconductor industries, and some chemical (industrial) industries, and any space that is used to transport pollutants such as suspended particles, micro-organisms, allergenic and pathogenic substances, microbes, etc. from one place to another by air.
In addition to the mentioned cases, industrial hygienic air handling units are also used in some industries, as well as greenhouse hygienic air handling units in some agricultural applications. The remarkable thing is that the Farsi translation of the word "Hygienic" means "sanitized" and from this point, it can be concluded that this type of air handling unit is one of the main members of the cooling and heating air conditioning systems of sensitive centers, especially in hospitals and rooms. It is used for cleaning etc. that must be sterilized.

How a hygienic air handling unit works

As it was said, this type of air handling unit has a function similar to normal air handling units, with the only difference being that in addition to the complete air sealing of the body, a more advanced filtration system has been implemented in the hygienic air handling unit. The coils of the air handling units must be connected to the chiller and boiler in the engine room of the building to perform cooling and heating operations.
A chiller is a device for cooling water and a boiler is a device for heating water, and this cold and hot water flows through the copper coils of the air conditioner, reducing or increasing the temperature of the air passing through the device in different seasons of the year. Different types of filters are used inside the air conditioner chamber according to the needs of each project. In general, in order to know what a hygienic (sanitary) air handling unit is and what its components are, as well as what are the differences with the normal (non-hygienic) type, we suggest that you read the rest of the article.
A complete cooling and heating air conditioning system works in such a way that the air enters the air handling unit from one direction and after applying processes such as cleaning by multiple filters, reducing or increasing the temperature, decreasing or increasing the humidity, etc., the air Clean and with the desired humidity and temperature, it is taken out from the other direction and is transferred to the desired units in the environment by a channel route. Here, the question that arises is, in addition to these components and processes that are used in normal air handling units, what other features and standards does the hygienic air handling unit have?

The unique features of the hygienic air handling unit

The features of the hygienic air handling unit are the same as the features of the normal air handling unit and it consists of different parts of the body, centrifugal ventilation fan and heating and cooling electric motor, humidity regulating equipment, inlet, outlet channels, etc. But its main difference is in the act of filtering the air, which usually does it in three stages. The way of hygienic air handling unit filter that in the first stage of filtration, the air passes through a mesh metal filter to prevent large solid pollutants from entering the hygienic air conditioner.
Then the air passes through the bag filters and up to 95% of the airborne particles and pollutants in it are removed by these filters. After the air passes through the fan, it will enter the third stage of filtration.
Special HEPA and ULPA filters are used in this step, the final air purification is done and 99.99% of pollutants (particles with a diameter between 0.1 and 0.3 microns) are removed from the air this is why only this type of air handling unit is used in Places like hospitals are used as hospital air handling unit and other sensitive places.
The body of the hygienic air handling unit is usually made of all steel and fully air-sealed to prevent the entry of polluted air as well as the decay of its body, because otherwise, the device itself will become a source of pollution. Also, all the metal parts and parts of the hygienic air handling unit must be made of stainless metal materials or have an anti-corrosion coating. Also, the material of the non-metallic parts used in the device should be selected in such a way that it is not prone to the creation of colonies of microorganisms on it. In the design and production process of the air conditioner, none of the parts should use dangerous and fragrant chemicals. Compliance with all these items is necessary for the construction of hygienic air handling units for hospitals, sterile parts of cleanroom air conditioners, etc., and should be done according to existing standards.

You can also read the article BENEFITS OF AIR HANDLING UNITS IN BUILDINGS for more information.

Final speech

On the site of Damatajhiz's specialized collection, technical information of dozens of models of hygienic air handling units, from reputable brands with original warranties, has been presented for you to enjoy the good feeling of optimal and smart shopping. To receive advice and choose the hygienic air handling unit required for your project, you can contact the experts of the air conditioning department at Damatajhiz during office hours.

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