Air Filtration is the processes for removing dispersed particles from an air stream and includes various kinds of filtration methods. Some of these methods employ coalescing, which is a process that brings small liquid droplets together to make larger ones. These larger droplets are then released from the filter media and into the airstream.

https://www.amazon.com/BNX-16x25x1-MERV-Filter-Pack/dp/B09XFKZB2C

Another option is the virtual impactor. This device has a nozzle that allows it to concentrate particulate matter from an airstream. The particles are then drawn in a chamber or into a particle receiving mechanism. These steps are repeated until particulate matter reaches the desired concentration.

Mechanisms

Air filtering systems from https://www.amazon.com/BNX-16x25x1-MERV-Filter-Pack/dp/B09XFKZB2C are built on the principles of filtration. These devices use a variety of techniques to separate airborne contaminants, including mechanical and chemical methods. Mechanical methods use the pore size of particulates to separate them from the air. The pore size does not necessarily determine the level of air filtration, however.

Chemical adsorption and chemical chemisorption are the main mechanisms that remove gaseous pollutants in the air. The former works by adsorbents that have small surface areas and a high surface energy. Chemical adsorbents behave differently in airflow than particulate.

Applications

Air filtration is a technique to remove airborne particles. Particles come in different sizes so different types are used in different industries. For instance, there are high-efficiency particulate air filters used in electronic and pharmaceutical industries. Another type of filter is the ultra-low-particulate filter, which removes particles as small as 0.3 micrometers.

Air filters are available in various forms, including liquid and air filters. How much purification is required will depend on the type of filter used. These filters can prevent airborne dust, microbes, and gases from entering the environment. These pollutants can cause many health problems and can clog electronic and mechanical equipment.

Cost

A building’s energy consumption can be reduced by air filtration up to five percent. An improved filter efficiency can lead to lower static pressure, which in turn leads to energy savings. Additionally, high-efficiency filters are typically able to pay for themselves in as little as two years.

While the initial cost of a MERV 14 filter is higher than that of a MERV 15 filter, the end cost is the same. Both filters have similar energy costs per changeout. Although the initial cost of the two filters is different, they offer similar benefits in terms indoor air quality and lower energy bills.