3. We take FOOD & WATER very seriously…….
& WHY are we NOT SERIOUS about AIR?
The AIR we breathe contains the most poisonous of
substances, since they are INVISIBLE, we do not take it
seriously…..
Let’s have a look at some facts about air:
We inhale 11,000L of air everyday
A sneeze travels at 160 Km/Hour – it infects us before a blink of an
eye
We spend more time indoors than outdoors and we breathe more
volume of air indoors than we do outdoors everyday
Current air pollution level is equivalent to smoking 10 to 20
cigarettes a day
There are more allergic elements Indoor than Outdoor
5. "Indoor air can be 5 to 10 times more
polluted than the air outside your
house"
- US EPA (Environmental Protection Agency)
Outdoor air has mainly Category 1
of air pollutants. But Indoor air has
all the 5 Categories of air
pollutants.
INDOOR air pollution
worse than outdoor
6. Filtration
Filtration is a mechanical or physical operation
which is used for the separation of solids from
fluids (liquids or gases) by interposing a
medium through which only the fluid can
pass.
6
7. Air filters
Air filter is a device that cleans air. It removes
contaminants such as dust, mold, and bacteria
from the air.
• Mechanical filters remove dust and particles by
capturing them on the filter media.
• Electro statically charged filter media in which
the fibers of the media are charged increasing
filter efficiency.
• Electronic air cleaners attract charged particles to
oppositely charged collectors.
7
8. Classification of Air filters
Air filters are classified in four types based on
their efficiency such as,
Pre-filter (medium efficiency device)
Fine filter (high efficiency device)
Super fine filters (dust spot efficiency of high
level) and
HEPA (high efficiency particulate) filters
8
9. What is HEPA Filter
• High Efficiency Particle Arrestor (HEPA) can trap particles upto 0.3 microns
or even smaller – Traps the tiniest of pollutants
• The quality, efficiency and life of a HEPA filter largely depends on the
thickness, folded area and the material used in it
11. HEPA (high efficiency particulate)
filters
• (a) Filter the air using webs of polypropylene fibers to strain,
intercept and diffuse airborne particles.
• (b) Electrically charge and collect airborne particles on a
collection grid. Many electronic air cleaners capture up to 100%
of airborne particles passing through the product. 11
12.
13. Types of engineered filters
• Germ Defense Filter - Trap and reduce airborne
bacteria, mold spores, and viruses.
• Pet Allergy Filter - This filter traps and reduces
pet dander and odors.
• Toxin Absorber Filter - Eliminate harmful
chemical fumes and volatile organic compounds
(VOCs) such as formaldehyde and benzene.
• Odor Remover Filter - This activated carbon filter
traps and eliminates odors from pets, cigarettes
and cigars, cooking, and mildew. Absorbing
effectiveness to 91%.
13
14.
15. Alarming Statistics
of Indoor Air Pollution
• Indoor air pollution is the No.1 cause of poor health
in India – Hindustan Times (March 5)
• 1/3rd of world’s asthma patients are from India –
WHO Report
• 93% of leave days are due to cold, cough and other
respiratory diseases – National Bureau of disease
• Lungs of most Urban children are under-developed
– Hindustan Times (June 2015)
• Of the world’s most 20 polluted cities, 13 are in India
– WHO Report
16. AHAM (Association of Home Appliance Manufacturers). 2015. ANSI/AHAM AC-
1-2015: Method for
Measuring Performance of Portable Household Electric Room Air Cleaners.
Washington, D.C.: AHAM.
Alberci RM, Mendes MA, Jardin WF, Eberlin MN. 1998. Mass spectrometry on-
line monitoring and
MS2 product characterization of TiO2/UV photocatalytic degradation of
chlorinated volatile organic
compounds. Journal of the American Society for Mass Spectrometry
9(12):1321–1327.
Aldred JR, Darling E, Morrison G, Siegel JA, Corsi RL. 2015. Benefit-cost analysis
of commercially available
activated carbon filters for indoor ozone removal in single-family homes.
Indoor Air 26(3):501–512.
Allen RW, Carlsten C, Karlen B, Leckie S, van Eeden S, Vedal S, Wong I, Brauer
M. 2011.
17. ASHRAE. 2008. (American Society of Heating, Refrigerating and Air-Conditioning
Engineers). Chapter
28: Air cleaners for particulate contaminants. In: 2008 ASHRAE Handbook: HVAC
Systems and
Equipment. Atlanta, GA: ASHRAE.
ASHRAE. 2014. Standard 185.2-2014: Method of Testing Ultraviolet Lamps for Use in
HVAC&R Units or
ASHRAE. 2015a. ASHRAE Position Document on Filtration and Air Cleaning. January.
Atlanta, GA: ASHRAE.
ASHRAE. 2015b. Standard 185.1-2015: Method of Testing UV-C Lights for Use in Air-
Handling Units
or Air Ducts to Inactivate Airborne Microorganisms. Atlanta, GA: ASHRAE.
ASHRAE. 2015c. Standard 145.1-2015: Laboratory Test Method for Assessing the
Performance of Gas
Phase Air-Cleaning Systems: Loose Granular Media (ANSI Approved). Atlanta, GA:
ASHRAE. Air Ducts
to Inactivate Microorganisms on Irradiated Surfaces (ANSI Approved). Atlanta, GA:
ASHRAE.
