Different types of Filters used in HVAC- Advantages and Applications of Filters

Types of Filters used in HVAC

 In this Post we are going to discuss about different types of filters that are used in HVAC industry. We will also be looking at their advantages. 

Introduction: 

                        The term air filtration refers to all applications where impurities are eliminated from a wind stream. Having a filtering system and consequently acquiring cleaner air is valuable for something beyond solace in houses, workplaces, hotels and inns. There are different purposes behind filtering of air. Innovation progressively requires rooms or workspaces liberated from dust, smoke and scents, making it important to filter air in various modern industrial exercises. Pure air is fundamentally essential in operation theaters, Pharmaceutical labs, clean spaces for electronics, data processing centers, Museums, libraries, Food ventures and public offices.

Prior to choosing a filter, it is essential to examine the accompanying points, such as Effectiveness, Dust collection capacity, Pressure drop, Test Methods, and so forth.

Next we will see the various kinds of air filters that are accessible along with their applications.

Roll Filters: 

            Synthetic filtration media are utilized as pre-filters or first level filters for air conditioning and ventilation units as protection of compressor stations, electrical switchboards, production hulls, modern industrial plants and so on. They are utilized for filtration of coarse dust particles. The material are non-combustible, self extinguishing and harmless to the health of living beings. Air Filter rolls catch airborne impurities to safeguard HVAC systems from harm. They comprise of a long length of channel media that can be sliced to estimate. These rolls are generally regularly utilized as pre-channels to catch enormous particles before they arrive at the last channels downstream, which expands the existence of the more costly last filters. Ideal for use in HVAC systems in business structures, schools, and colleges.

Prefilter (PANFIL Metal Frame): 

            These Filters are intended for commercial and light medium modern industrial applications. They can be utilized in everyday air filtration systems and as pre-filtration to safeguard more costly higher productivity filters. They are especially applicable in humid or seaside regions where disposable filters are immediately corrupted and in applications which request higher air flow through filters. Some of the benefits of these type of filters are, high dust holding limit, completely cleanable and reusable, powerful construction for high speed activity unaffected by high humidity and air to most synthetic chemicals and fumes, no risk media migration range of efficiencies. and so forth..

Prefilter (Prebag Filters): 

            Regardless of how cutting-edge an air purifier is, it needs to have a pre-filter. The pre-filters are worked to catch particulates drifting in the air that are greater than 5 microns. Prebag filters are utilized as prefilters to filter fundamental filter component, to isolate coarse residue particles in ventilation and cooling units. Spacer between individual sacks guarantee an even stream as well as the uniformly dispersion of residue all through the whole filter. They extensively increment service life of ensuing fine dust filters. In this way contributing fundamentally to operating cost savings. Some of the benefits of prebag filters are high residue holding limit, low pressure drop, high economic efficiency, decreased energy operating expenses, controlled media dividing and so on..

Bag Filters (Multi-bag filters): 

            Multi-bag filters are utilized in cooling units as the second or last filtration level for conditions with high requests on detachment of fine dust particles particularly for medication, drug industry, electrical designing, thermal energy plant, food handling industry and so on. Spacers between the singular bags guarantee an even stream as well as the uniformly dispersion of dust all through the whole filter. It is prescribed to utilize the pre-bag filter to eliminate coarse residue to expand administration life of multi-bag filters and to lessen functional expense. Some of the advantages of multi-bag filters are high residue holding limit , low pressure drop, high financial productivity, diminished energy working expenses, controlled media separating and so on.. Prebag filters are the most well-known air filters in HVAC systems for modern and business applications as well with respect to private use to further develop indoor air quality and solace. The filters in the supply air are utilized as first and second channel stages, either as complete filtration option for these applications or as prefilters for cleanroom process applications. The bag filters are likewise utilized in the exhaust air or in distribution networks to safeguard the air dealing with Air conditioning units. Bag filters have a fundamentally higher residue holding limit and longer lifetimes than different filters.

HEPA Filters: 

            The acronym "HEPA" stands for High Efficiency Particualte Air filter, which is officially defined by Department of Energy, USA. HEPA filters are utilized in circumstances requiring high or extremely elevated degrees of air purity. Some of the typical applications can be found in clinics, microelectronics, medicines, chemistry, pharmacy, microbial science and food industry. A portion of the benefits of HEPA filters are, they are utilized for laminar stream flow applications. They have enormous filter surface, low pressure drop, diminished energy utilization. They optimize velocity distribution. They are ensured leak free. They are precisely mechanically stable. They have least risk of damage. They are One Piece and have no leak gaskets etc. This sort of filter is equipped for catching little microns, and furthermore has a MERV rating somewhere in the range of 17 and 20, meaning it can trap tobacco smoke and microscopic organisms.

High Temperature HEPA Filters (HEPA - As):

         High temperature HEPA filter is a high proficiency broadened surface air filter intended for use in Heating Ventilation and Air Conditioning uses of all types. Rigid cnstruction makes the HEPA as predominant filter in Variable air volume (VAV) systems or any application where outrageous circumstances require extra filter strength and dependability. Some of the benefits of high temperature HEPA filters are, huge filter surface with drained miniature glass fiber media, temperature opposition upto 120 degree Celsius, low installation depth, high residue holding limit, high wind stream limit with low pressure drop, high financial effectiveness, decreased energy working expenses and so on..

        These are some of the filters that are most commonly used in Heating ventilation and Air conditioning industry. Few Applications of these types of filters and some of their advantages are discussed in the post above.

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