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Air Handling unit (AHU) Filters For
Air Filtration and its Practical Application
The essential functions of HEPA Filters are to improve indoor Air Quality and to protect downstream equipments and facility components. Good HEPA Filters controls all human sneeze droplets.
Filtration Mechanisms :
The two main streams of filtration employed by air filters are
HEPA Filter Performance
There are several aspects of HEPA filter design that impact on filtration performance. The important parameters include:
Material / Type: Different media types can have various effects on efficiency. Synthetic filter media are resistant to moisture build up and ideal for preventing the proliferation of mould and mildew.
Thickness / Density :
Fibre Quality / Size : Quality air media lasts longer and does not shred fibres in the duct. Fibre size can have various effects on efficiency.
Surface Area : Higher media surface area equates to a lower pressure drop and higher contaminant holding capacity. Pleated air filtration media has a greater surface area and contaminant holding capacity than flat air filtration media. The higher the number of pleats, the larger the surface area it can contain. Ultimately, the higher surface area maximises the filtration and contaminant holding capability and reduces energy consumption
HEPA Filters standards
Globally accepted HEPA Filter performance rating systems are