Domestic technical textiles Industry Segment-wise consumption of ...

HVAC filters
HVAC stands for heating, ventilating, ntilating, and and air air conditioning. conditioning. The The HVAC HVAC systems systems are used in
industries, commercial commercial and residential buildings buildings where humidity and temperature need to be closely
regulated.
The filtration systems in general can be classified as Liquid -Solid separation (e.g. g. vacuum and
pressure filters), Air-Gas Gas separation (e.g. activated carbon filters) and Air-Solid Air Solid separation (i.e. filters
that remove remove particulate particulate matter matter from from air). HVAC filters belong to the category of air filtration products.
The filtration products are also also classified classified based based on on their end application as depicted below:
Air filter
The HVAC HVAC filters filters include include pre filters, filters, medium medium efficiency filters and HEPA filters. HEPA or High
Efficiency Particulate Air Air filters are are high high efficiency efficiency filters capable of removing 99.97% oof
o airborne
particles of of 0.3 0.3 micrometers micrometers (µm) diameter. diameter. Filters capable of removing 99.999% of dust, pollen,
mold, bacteria and and any airborne particles of size 120 120 nano metres or larger from the air are categorised
as ULPA or Ultra Low Penetration Air filter. filter
Product Characteristics
Automobil
e filters
Lube oil
filter
Classification
based on
Application
Fuel filter
Pre filters
Air filter
(HVAC
filters)
Medium
efficiency
filters
Industrial
filters
Filter media media used used in in air filters filters are are nonwoven fabrics fabrics laid perpendicular to the air flow to arrest the
solid particulate particulate matter. Air Air filters filters can can be be either either mechanical filters or electrostatic filters
(electrostatically enhanced filters). ilters). Most Most of of the the filters filters fall fall under under the category of mechanical filters and
depend on four primary filtration mechanisms - sieving, impaction, interception, and diffusion. Filters
are characterized by their filtration efficiency, MERV rating and Micron size.
Liquid
filter
HEPA
filters