HEPA, Carbon and AHU Pre Filters

HEPA air filters are made from very tiny glass fibers that are made into a tightly woven paper. This creates a filter consisting of a multitude of very small sieves that can capture extremely small particles, including some biological agents. Once trapped, contaminates and particles are not able to flow back into circulation, due to the highly absorbent pores of the HEPA air filter.

S.NoFeaturesSpecifications
1Available Filter typesBox and Blanch
2Available Sizes in feet’s (LxB) for Mini Plate Filters H=75mm1×1,2×2,3×2,4×2, 1.5×1.5,2×1.5,3×1.5,4×1.5
3Available Sizes in feet’s (LxB) for D-Plate Filters H=100mm1×1,2×2,3×2,4×2, 1.5×1.5,2×1.5,3×1.5,4×1.6
4Efficiency of media99.99%
5Particle Allowed range0.3 µ
6Material of ConstructionAluminum, MS Powder Coated, SS 304
7ProtectionBoth sides should be covered by metallic powder coated grill
8Other than standard size filtersYes, as per the Req.

High efficiency particulate air (HEPA) is originally called high-efficiency particulate absorber but also sometimes called high-efficiency particulate arresting or high-efficiency particulate arrestance, is a type of air filter. Filters meeting the HEPA standard have many applications, including use in medical facilities, automobiles, aircraft and homes. The filter must satisfy certain standards of efficiency such as those set by the United States Department of Energy (DOE).

To qualify as HEPA by US government standards, an air filter must remove (from the air that passes through) 99.97% of particles that have a size of 0.3 µ.

HEPA filters are composed of a mat of randomly arranged fibers. The fibers are typically composed of fiberglass and possess diameters between 0.5 and 2.0 micrometers. Key factors affecting its functions are fiber diameter, filter thickness, and face velocity. The air space between HEPA filter fibers is typically much greater than 0.3 µ.

HEPA Filters are available in various sizes as per the req.

Carbon Filters

What is Activated Carbon Filter

Activated carbon air filters consist of a vast system of pores of molecular size. These pores are highly adsorbent, forming a strong chemical bond/attraction to odorous, gaseous, and liquid contaminates, especially organic chemicals/compounds.

S.NoFeaturesSpecifications
1Available Filter typesBox and Blanch
2Available Sizes in mm (LxB) and H=50,75,mm and as per Req.300×400, 600×400, 800×400, 600×600 as per Req.
3Efficiency of media99.99%
4Particle Allowed range5 µ and 10 µ
5Material of ConstructionAluminum, MS Powder Coated, SS 304
6ProtectionFront sides should be covered by Aluminum grill
7Other than standard size filtersYes, as per the Req.

Activated Carbon Filter Facts

  • Activated carbon air filters trap odors and chemicals in highly absorbent granules (or pores), which look like a hard scrub brush.
  • Activated carbon is a charcoal that is treated with oxygen in order to open up millions of tiny pores between the carbon atoms, resulting in a highly adsorbent material.
  • Activated carbon filters were found to removed 60-70% of airborne ozone compared to filters without activated carbon. These filters removed harmful VOC’s (Volatile Organic Compounds) by 60-80%, and formaldehyde by 25-30%.
  • According to a report released by the Centers of Disease Control, Dept. of Health and Human Services, and the National Institute for Occupational Safety and Health, activated carbon is an excellent absorber of most organic chemicals.