How to Check Your Air Quality and Get Fresh Air for your home


How to check your air quality and get fresh air

General Air Quality Scale as per US EPA Standard

The AQI scale used for indexing the real-time pollution of a location and is based on the latest US EPA standard, using the Instant Cast reporting formula.

AQIAir Pollution LevelHealth ImplicationsCautionary Statement (for PM2.5)
0 – 50GoodAir quality is considered satisfactory, and air pollution poses little or no riskNone
51 -100ModerateAir quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
101-150Unhealthy for Sensitive GroupsMembers of sensitive groups may experience health effects. The general public is not likely to be affected.Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
151-200UnhealthyEveryone may begin to experience health effects; members of sensitive groups may experience more serious health effectsActive children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion
201-300Very UnhealthyHealth warnings of emergency conditions. The entire population is more likely to be affected.Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.
300+HazardousHealth alert: everyone may experience more serious health effectsEveryone should avoid all outdoor exertion

Are you wondering what the different colors and numbers below mean?

  • 50- GOOD
  • 100- MODERATE
  • 200- UNHEALTHY
  • 500- HAZARDOUS

The numbers are the Air Quality Indexes, which is based on a scale from 0 (good) to 500 (bad).The colors correspond to the different health impact categories (good, moderate, unhealthy… hazardous)

How Air Quality Index (AQI) is calculated

The Air Quality Index is based on measurement of particulate matter (PM2.5 and PM10), Ozone (O3), Nitrogen Dioxide (NO2), Sulfur Dioxide (SO2) and Carbon Monoxide (CO) emissions. Most of the stations on the map are monitoring both PM2.5 and PM10 data, but there are few exceptions where only PM10 is available.

All measurements are based on hourly readings taken by the institutes: For instance, an AQI reported at 8AM means that the measurement was done from 7AM to 8AM.

Know the pollutants in air:

PM10 and PM 2.5:

For the readers not familiar with particles size, PM10 refers to particles smaller than 10 micrometer, and for PM2.5, it refers to smaller than 2.5 micrometers. So, filtering out all the particulates smaller than “0.1 microns (same as 0.1 micrometers)”, means that it can filter particles 25 times smaller than the harmful PM2.5! So, no worries Klaus, the newest technologies are definitely efficient!

Nitrogen Dioxide (NO2):

NO2 is a reddish brown gas that is emitted from all combustion engines. There are two main nitrogen based compounds that are emitted from combustion engines: NO2 and nitric oxide (NO). Collectively these two pollutants are referred to as NOx or oxides of nitrogen.

NO2 life-cycle

At the point of emission (i.e. the exhaust pipe), the proportion of NOx is around 90% NO and 10% NO2 .

After a few hours in the atmosphere and in the presence of volatile organic compounds (VOCs) the NO is converted to NO2. This reaction can occur over a couple of seconds to a few hours .

NO2 reacts further with other substances in the air to form nitric acid, particulate matter and substances called PANs (peroxyacyl nitrates).

Also with sunlight NO2 can convert back to NO and produce ozone (O3) as a side pollutant. Because of the potential of NO2 to produce these “secondary” pollutants it is important to monitor and regulate NO2.

How NO2 Affects US:

Short and long term exposure to NO2 has been linked with an increased risk of respiratory problems. People with asthma, young children and older adults have an increased sensitivity to its effects .

The secondary pollutants caused by the presence of NO2 in the atmosphere also have their own adverse effects. PANs are an irritant, nitric acid causes acid rain and particulate matter and O3 cause respiratory problems.

Sulfur dioxide (SO2)

Sulfur dioxide appears as a colorless gas with a choking or suffocating odor. Boiling point -10°C. Heavier than air. Very toxic by inhalation and may irritate the eyes and mucous membranes. Under prolonged exposure to fire or heat the containers may rupture violently and rocket. Used to manufacture chemicals, in paper pulping, in metal and food processing. Rate of onset: Immediate & Delayed Persistence: Minutes to hours Odor threshold: 1 ppm Source/use/other hazard: Disinfectant and preserving in breweries and food/canning; textile industry; batteries.

Sulfur dioxide is a colorless gas with a pungent odor. It is a liquid when under pressure, and it dissolves in water very easily. Sulfur dioxide in the air comes mainly from activities such as the burning of coal and oil at power plants or from copper smelting. In nature, sulfur dioxide can be released to the air from volcanic eruptions.

Carbon Monoxide (CO)

Carbon monoxide (CO) is an odorless, colorless gas formed by the incomplete combustion of fuels. When people are exposed to CO gas, the CO molecules will displace the oxygen in their bodies and lead to poisoning.

Since CO has no odor, color or taste, it cannot be detected by our senses. This means that dangerous concentrations of the gas can build up indoors and humans have no way to detect the problem until they become ill. Furthermore, when people become sick the symptoms are similar to the flu, which can cause victims to ignore the early signs of CO poisoning.

The CDC estimates that approximately 400 people die from unintentional CO exposure in the United States every year. Data specific to Minnesota show that an average of 14 people die due to unintentional CO poisoning each year. The same data shows that another 307 people visit emergency department each year for treatment of symptoms linked to unintentional CO exposure. 

Sources of Carbon Monoxide at Home:

In simple terms, CO is produced whenever a material burns. Homes with fuel-burning appliances or attached garages are more likely to have CO problems Common sources of CO in our homes include fuel-burning appliances and devices such as:

  • Clothes dryers
  • Water heaters
  • Furnaces or boilers
  • Fireplaces, both gas and wood burning
  • Gas stoves and ovens
  • Motor vehicles
  • Grills, generators, power tools, lawn equipment
  • Wood stoves
  • Tobacco smoke

Yes, some people are at a greater risk for CO poisoning. Those individuals include people with:

  • Respiratory conditions, such as asthma or emphysema
  • Cardiovascular disease
  • Anemia or sickle cell anemia

Also, the elderly and young children are at a greater risk for CO poisoning than adults. Individuals engaging in strenuous activity have also been found to be at greater risk. Remember, ANYONE can become sick and die from CO poisoning when exposed to very high levels.

Ozone (O3):

Ozone in the upper atmosphere–referred to as “stratospheric ozone”–helps filter out damaging ultraviolet radiation from the sun. Though ozone in the stratosphere is protective, ozone in the atmosphere – which is the air we breathe – can be harmful to the respiratory system. Harmful levels of ozone can be produced by the interaction of sunlight with certain chemicals emitted to the environment (e.g., automobile emissions and chemical emissions of industrial plants). These harmful concentrations of ozone in the atmosphere are often accompanied by high concentrations of other pollutants, including nitrogen dioxide, fine particles and hydrocarbons. Whether pure or mixed with other chemicals, ozone can be harmful to health.

Whether in its pure form or mixed with other chemicals, ozone can be harmful to health. When inhaled, ozone can damage the lungs. Relatively low amounts of ozone can cause chest pain, coughing, shortness of breath and, throat irritation

The same chemical properties that allow high concentrations of ozone to react with organic material outside the body give it the ability to react with similar organic material that makes up the body, and potentially cause harmful health consequences. When inhaled, ozone can damage the lungs. Relatively low amounts can cause chest pain, coughing, shortness of breath and throat irritation. Ozone may also worsen chronic respiratory diseases such as asthma and compromise the ability of the body to fight respiratory infections. People vary widely in their susceptibility to ozone. Healthy people, as well as those with respiratory difficulty, can experience breathing problems when exposed to ozone. Exercise during exposure to ozone causes a greater amount of ozone to be inhaled, and increases the risk of harmful respiratory effects. Recovery from the harmful effects can occur following short-term exposure to low levels of ozone, but health effects may become more damaging and recovery less certain at higher levels or from longer exposures.

Why air purifiers for home?

It is very hard to wear masks inside your home regularly. These pollutants are not only available in outside environment but can also be found in your home. During winter pollution mixes with fog and creates SMOG which is very dangerous and with lot of harmful pollutants. And to clean the air inside we need various natural and artificial ways.

As natural process is not possible today in the cities like delhi,, Mumbai, Chennai and others cities. As there are very less greenery around and inside your home.

So we have to take the help of technology and must use air purifiers to purify and get clean air in our home.

Below you can find best air purifiers for your home:

Philips AC1215/20 Air purifier

Philips AC1215/20 Air purifier, removes 99.97% airborne pollutants with 4-stage filtration

Item Dimensions LxWxH32.5 x 54.1 x 21.1 Centimeters
Power source typeCorded Electric
Item Weight5.24 Grams

About this item

  • Vitashield Intelligent purification automatically senses air quality and removes 99.97% airborne pollutants as small as 0.003 microns, 800 times smaller than PM 2.5
  • Purifies a standard room in just 12 minutes with a CADR of 270 m3/hour (Standard room size is 18 ft by 12 ft with an 8 ft ceiling height). Recommended room area: 226-333 sq ft.
  • 4 Stage Filtration process through pre filter, activated carbon filter & double layered H13 Grade TRUE HEPA Filter
  • 4-color air quality indicator gives real time air quality feedback
  • Removes 99.90% bacteria and viruses, tested to remove airborne H1N1 virus
  • Removes 99.99% pollen and house dust mites, Allergy friendly quality tested by ECARF
  • Philips is the no.1 brand in Air purifiers in India (Source: Euromonitor International Limited; Consumer Appliances 2018ED)

Honeywell HAC25M1201W 53-Watt Air Purifier For Room

Honeywell HAC25M1201W 53-Watt Air Purifier For Room

Item Dimensions LxWxH20.7 x 38.2 x 48.6 Centimeters
Power source typeCorded Electric
Item Weight6.5 Kilograms

About this item

  • Air Touch A5 indoor air purifier by Honeywell, a Fortune 100 company.
  • Versatile Coverage Area and efficiency – CADR (Clean Air Delivery Rate) – 250 cu m/hr, offers up to 30 sq.m coverage area for a room with 2.74m height – suitable for use in living rooms and bedrooms
  • Three stage advanced filtration system that removes pollutants with more than 99% efficiency.
  • Washable pre-filter that removes larger dust particles, pet hair/dander, soil etc and improves the life of HEPA filter
  • Combined filter with High-efficiency HEPA and activated carbon filter that removes any microscopic pollutant and allergens above 0.3 microns including PM2.5 and pollens
  • It also removes removes formaldehyde, toxic gases, VOCs and odour.
  • Completely ‘Ozone Free’ Air Purifier. Does not emit any harmful gases as a byproduct of the filtration technology

Havells Freshia AP-20 40-Watt Air Purifier with Remote (White/Blue)

Havells Freshia AP-20 40-Watt Air Purifier with Remote (White/Blue)

ColourWhite, Blue
Item Dimensions LxWxH37.8 x 22.6 x 56.6 Centimeters
Power source typeCorded Electric

About this item

  • Air Purifier Type – Room; Purification method – True HEPA Technology, Noiseless BLDC Motor
  • Coverage area: 215 square feet / 20 sq. metres., especially suitable for bedrooms
  • Clean Air Delivery Rate (CADR): 180 m3/hr (215 square feet); CADR indicates the volume of purified air (in cubic metres) which an air purifier produces every hour
  • Wattage: 40 watts with 3 levels Fan Speed
  • Unique Safety Controls: Sleep mode, Manual Timer Setting, Automatic Filter Replacement reminder, ODOUR Sensor
  • Removes 99.18% allergens & Filtration upto 0.3 microns, 80 times smaller than PM 2.5
  • AiroFresh Technology -5 Stages of Filtration: Pre-Filter, Cold-Catalyst, Activated Carbon, Antibacterial and HEPA

Eureka Forbes Aeroguard AP 700 Air Purifier with H1N1 filter

Eureka Forbes Aeroguard AP 700 Air Purifier with H1N1 filter removes 99.99% airborne viruses,6 stages of filtration(FilterMaxx Technology),5 Years Warranty on Motor (Cool Grey)

ColourCool Grey
BrandEureka Forbes
Item Dimensions LxWxH17.2 x 32.5 x 51 Centimeters
Power source typeCorded Electric
Item Weight5000 Grams

About this item

  • 6 Stages of Filtration fith FilterMaxx Technology
  • Complete Disease Protection system with Unique H1N1 Swine Flu Resistant Filter + Lung Filter + Anti-Bacterial Filter
  • Certified By the of ASI (Asthma Society of India)
  • Ultra Silent Sleep mode ,Auto Mode, Child Lock Mode,Timer Mode(1/2/4/8 hours)
  • 5 Years Warranty on Motor/1 year product warranty
  • 56 m2 Area Covereage (602 Sq. Ft.)
  • 43 Watts Electricity Consumption

Glen Air Purifier 6033 5 Stages Purification

Item Dimensions LxWxH

About this item

  • 5 Steps Purification for 99.9% Pure Air ( Pre-Filter + HEPA filter ,Activated carbon , Cold catalyst filter, Built-in loniser )
  • CADR (Clean Air Delivery Rate) – 230 m³/h || Air quality indicator
  • Three fan speed || 8 hour timer || Filter replacement indicator || Filter Dimension ( HxWxT ): HEPA 350x245x20mm ,Carbon 350x245x10mm , Catalyst 350x245x10mm
  • Auto mode function || Sleep mode function || Remote control
  • Power Consumption – 45W || Maximum room coverage area – 27m² – 36m² ( * Depending on the height of the roof. )

Philips Air Purifier – Series 2000 AC2958/63 With WiFi

Philips Air Purifier – Series 2000 AC2958/63 With WiFi New Launch 2020 up to 39m2

Item Dimensions LxWxH33 x 33 x 65.2 Centimeters
Power source typeCorded Electric
Control MethodTouch

About this item

  • Intelligent auto purification Smart sensing technology senses in real time and automatically removes all three major threats of indoor air: particles, harmful gases and indoor allergens. Switch easily between 4 modes; Auto, Sleep, Gentle and Turbo.
  • Color-coded air quality Easily identify the air quality in your home with a simple color-coding system displayed on the top of your air purifier.
  • 3-layer filter Prefilter catches dust and hair, followed by the activated charcoal filter that removes harmful gases and unpleasant odors. Finally, the NanoProtect HEPA filter captures ultra-fine particles as small as 0.003 microns.
  • Smart filter status indicator See the amount of pollutants filtered and how much life your filter’s got left for effortless maintenance
  • 1 year warranty

Mi Air Purifier 3 with True HEPA Filter and Smart App Connectivity & Air Purifier 2C

Mi Air Purifier 3 with True HEPA Filter and Smart App Connectivity & Air Purifier 2C with True HEPA Filter (White) Combo

  • Product 1: True HEPA Filter with filtration efficiency of 99.97% for particle size up to 0.3 microns
  • Product 1: OLED touch Display (Shows real time PM2.5 concentration, Temperature and humidity, Wi-Fi connection and Working mode)
  • Product 1: Smart app control, Rated Frequency: 50/60 Hz
  • Product 1: Works with Google assistant and Amazon Alexa

Philips AC3257/20

Philips AC3257/20, removes 99.97% airborne pollutants with numerical PM2.5 display, ideal for living room

Item Dimensions LxWxH47.4 x 34 x 79.8 Centimeters
Power source typeCorded Electric
Item Weight9826 Grams

About this item

  • Removes 99.97% harmful airborne pollutants & allergens like dust, pollen, pet dander & particles as small as 0.003 microns, up to 800 times smaller than PM 2.5
  • Vitashield intelligent purification system removes 99.9% bacteria and virus, including >99.9% reduction of airborne H1N1 virus, tested by airmid
  • Only takes 8 minutes to purify a standard room with a clean air delivery rate of 397 m3/hour, ideal for medium to large bedroom, up to 505 sq ft
  • NanoProtect techology with 4 stage filtration removes pollutants through pre-filter, activated carbon filter (FY3432/00) & double layered H13 Grade true HEPA filter (FY3433/00)
  • Real-time monitoring & control through aerasense, provides numerical display of air quality (PM2.5), along with simple colour-ring indicator
  • Special Allergen mode boosts indoor airborne allergen removal
  • Comes with quiet sleep mode that turns down fan speed and noise level for a comfortable night’s sleep, along with light controls that you can switch off as you like

Philips AC0820/20 air Purifier

Philips AC0820/20 air Purifier- Removes 99.95% air pollutants, Real time air Quality, Ideal for Small Rooms

Item Dimensions LxWxH27.6 x 27.6 x 40 Centimeters
Item Weight2400 Grams

About this item

  • Removes 99.95% airborne pollutants such as PM2.5, pollen, dust mites, etc
  • One button effortless control
  • Purifies a standard room within 16 minutes with a CADR of 190 m3/hour (Standard room size is 18 ft by 12 ft with an 8 ft ceiling height)
  • Ideal for small rooms, recommended area: 160 sq ft. 234 sq ft
  • Intelligent Auto purification mode
  • Color indication for real time air quality
  • 3 Modes – Auto, Sleep and Turbo

For checking other air purifiers of your choice click here below


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