Frequently Asked Questions for Air Purifier

An air purifier sucks the air inside the room , polluted air passes through all the filters and comes out from outlet as clean air.

Keep it on the floor atleast 6 inches away from the wall.

Yes both the devices can be used in the same room, but you must ensure that air purifier is not kept just below the air conditioner.

No, it is not meant to be used as an exhaust in the kitchen.

Yes it can be used in the the toilets, but with specific configuration of filteration technology.

No there is no child lock.

Keep at least two to three feet away from the bed for better and instant relief from pollutants

It can run continuously for 24 hours, but to give a rest for half an hour is good for machine.

Changeable filter life is 08 to 12 months ( Depend upon usage and environment )

U. V. Tube kills bacteria and virus.

No this it does not emit any ozone.

An activated carbon absorbs odor and smoke present in the room.

PCO is Photo catalyst oxidization filter. This oxidizes the pollutants in the air when it interacts with U.V. Tube.

Anti Bacterial Filter is for eliminating bacteria up to 5 micron size.

Atlanta Healthcare air purifiers use H13 grade HEPA filter

HEPA Filter starts from H 06 to H 13 grade. A good Hepa consists of many mini pelets and maximum surface.

A good hepa filter is made up of impregnated glass fibre.

A HEPA can eliminate up to 0.03 micron size pollutants.

P.M2.5 stands for particulate matter size up to 2.5 micron.

It removes carbon monoxide, Hydrogen Sulphide, Ammonia, Sulpher Oxide, Nitrogen Oxide , vehicular emmission and VOCs.

ULPA Filter stands for Ultra Low Particulate Air, it can eliminate pollutants up to 0.01 micron size.

A humidifier insreases the level of moisture in the room. This is to use in peek winter and summer season.

The water tank capacity in Universal 450 is 1.08 litre.

Yes, all Atlanta Healthcare air purifiers come with remote control function.

No, it does not display PM 2.5 measurement.

Atlanta Healthcare air purifiers have noise level < 42 decibles.

Air flow is a measurement of amount of air per unit of time that flows through an air purifier. CADR is clean air delivery rate .

Two methods: first is to feel the difference and second is to measure with an air quality monitor.

Our air purifiers are equipped with advance iCluster technology.

You have to ensure that you clean its filter once in a month with help of a vacuum cleaner.

Warranty of our air purifier is one year.

We do have our Distributors/ Dealer in Mumbai, Delhi, Bangalore, Hyderabad, Kerla, Tamilnadu, Delhi, Gurgaon, Ghaziabad and Patna

Frequently Asked Questions for Cambridge N99 pollution mask

Air pollution masks help you protect against gas based pollution, such as smells, benzene and formaldehyde, particle pollution such as PM2.5, pollen or smoke and pathogens such as viruses and bacteria. Ideal for cyclists, people in at risk groups for respiratory disease or anyone living in urban environments with high air pollution level. Currently available in 35 countries across the world. The brand is from the UK.

Atlanta Healthcare Cambridge Masks are N99 tested and they filter out dust, pollution particles such as PM10, PM2.5 and PM0.3 and bacteria by its unique Triple Filtration System.

Atlanta Healthcare Cambridge Masks™ have been treated with silver, which means they block and kill 99.77% of micro particles such as airborne bacteria.

The triple layer filtration technology behind these masks are developed by Ministry of Defence in the UK.

The Triple Filtration System consists of three layers: The Primary Filter Layer, Three-Ply Micro Particulate Filter and Military Grade Carbon Filter.

Triple Layered Filtration System

The Primary Filter Layer :
Eradicates larger pollution particles such as Dust and PM10.
Three-Ply Micro Particulate Filter :
Stops 100% of small particulate matter such as PM2.5, PM0.3.
Military Grade Carbon Filter :
Invented by UK’s Ministry of Defence and it keeps out viruses, bacteria and gaseous pollutants such as VOCs, Ozone, Benzathine and Formaldehyde.

Pollution clouds contain particles and gases, which are trapped by the particulate layer and fully absorbed by the military carbon layer.

These masks can be used up to 200 breathing hrs in moderate pollution levels. These masks have expiry of 4 years if unused.

Yes, these masks can be washed using lukewarm water and mild detergent. These masks are reusable but need to be discarded if you experience difficulty in breathing.

Masks come with ear-loops and a nose clip. Each size is based on weight of the person, please refer to size chart for accurate size that fits you. Once worn, you need to press the adjustable nose clip against your nose and make a seal across the mask so no bad air is leaked in and you are only breathing through the mask. Please ask for adjustable head strap to fix your mask better on your face and secure properly.

  • Air pollutants, Dust, Pollen, Smell, Smoke and other Airborne Allergens
  • Running and Jogging
  • Cycling
  • Outdoor Activity for Kids
  • Hospitals
  • Air Borne Diseases
  • Travelling in public transport (bus/metro)
  • Biker
  • Industries

Available in three valve options : No valve , one valve, two valve

Valve is used for exhalation. Mask with 2 exhalation valve helps you exhale better during strenuous physical activities such as running, jogging, playing outdoor, It also helps ease the fogging in case you wear spectacles.

L65 – 89 kg
M33 – 64 kg
S11 – 32 kg
XS6 – 10 kg

Frequently Asked Questions for AirVisual Node

The Atlanta Healthcare AirVisual Node is an “all in one” air quality monitoring solution that displays immediate, accurate air quality data both indoors and out, to help you create healthier, more productive environments.

As the most precise consumer air quality monitor on the market, the Node displays real-time PM2.5 and CO2 readings along with air quality forecasts, outdoor air quality insights and phone alerts. It also measures temperature and humidity.

Placed indoors, your Node provides insights into your indoor environment’s air quality and contrasts this with local outdoor air quality. The Node then gives tailored recommendations to optimise a healthy environment, such as alerting you to open windows and ventilate when CO2 builds up indoors, run an air purifier when indoor PM2.5 is high, or advising when you should exercise outdoors.

Placed outdoors, your Node can become a public outdoor air monitoring station, sharing its air quality data with a global network to hugely benefit your community and beyond. It is the only air monitor to provide air quality forecasts 3 days in advance, allowing you to plan your activities to optimize health and wellbeing.

Track your Node’s data on-the-go using the AirVisual app or website, and invite your friends and family to follow it too.

  • High precision laser to counts particles in the air, which is then processed with a unique algorithm to calibrate for external factors such as temperature, humidity and outliers.
  • Bright LED display compares indoor readings with outdoor data, from the nearest official station, by collecting cloud data so users know when to ventilate, go outside or stay inside.
  • Air-flow control fans provide more stable readings and improved durability.
  • Three-day air quality forecasts driven by in-house artificial intelligence enable users to proactively minimize exposure to outdoor air pollution.
  • PM2.5: 0.3μm to 2.5 μm (particulate matter pollution between these diameters)
  • CO2 (Carbon dioxide): 400ppm (parts per million) to 10,000ppm
  • Temperature: -10°C to +40°C; 14°F to +104°F
  • Humidity: 0-100%

Yes, however, in order to get the most accurate information from outside, it’s important that weather (including rain, wind, temperature and direct sunlight) does not interfere.

When you set up a Node for outdoor use, it needs to be protected from exposure to water, strong wind and direct sunlight, as well as have access to an electrical outlet. Optimal locations include a shaded porch or roofed balcony. The Node needs a stable and strong Wi-Fi connection.

For most usage, the Node does not need to be recalibrated for outdoor placement within a year. After heavy usage in extreme conditions, or long term usage in normal conditions, a sensor replacement is necessary. It all depends on the level of accuracy a particular user want.

Sensor lifetime is affected when outdoor conditions are frequently heavily polluted. The accuracy may also decrease if the sensor is exposed to extreme weather conditions (-10C or >40C).

Generally, concentration readings will be within +-10% variation. This may be because of varying conditions across space and time, as well as sensor natural drifting.

The Node was built for durability and reliability. The only piece that would need to be changed is the sensor. The sensor replacement could be offered as a service to customers.

In the near future, the Node will employ IFTTT technology to work with other IoT home devices. Thermostats, for instance, that have Wi-Fi capabilities will be able to be controlled with simple rule-based instructions.

One, on the Node’s screen itself. It is recommended that you select an outdoor station closest to where you live, so that you can use the Node to compare indoor and local outdoor quality, and optimise your activities accordingly. E.g. when indoor air quality is poor but outdoor is good, open windows to ventilate.

If you wish to monitor other cities simultaneously, you can do so using AirVisual free mobile app.

US and China AQI are generated by different air pollution equations. The US AQI typically yields higher AQI values under 200, for the same PM2.5 concentrations, and for this reason is regarded as the more stringent (recommended) system. **Guidelines are based on inhaling specified level of air quality for a 24-hour period.


  • AQI: 0-50
  • PM2.5 concentration: 0-12 ug/m3 (US AQI);
  • Little to no health risk
  • AQI: 51-100
  • PM2.5 concentration: 12.1-35.4 ug/m3 (US AQI);
  • Sensitive individuals may experience irritations
Unhealthy for SG
  • AQI: 101-150
  • PM2.5 concentration: 35.5- 55.4 ug/m3 (US AQI);
  • Sensitive groups should limit outdoor exertion
  • AQI: 151-200
  • PM2.5 concentration: 55.5-150.4 ug/m3 (US AQI);
  • Harmful for sensitive groups, reduce outdoor activity for everyone
Very Unhealthy
  • AQI: 201-300
  • PM2.5 concentration: 150.5-250.4 ug/m3 (US AQI);
  • Everyone can be affected. Avoid heavy outdoor activity.
  • AQI: 301+
  • PM2.5 concentration: 250.5+ ug/m3 (US AQI);
  • Serious risk of respiratory effects. Everyone should avoid outdoor activities.

For CO2, there is no AQI standard as such. Based on the literature about Co2, AirVisual designed this standard:


  • CO2: CO2 < 700 ppm
  • Ideal comfort level
  • CO2: 701-1,000 ppm
  • May experience stiffness and odors
  • CO2: 1,001-1,500 ppm
  • General drowsiness
  • CO2: 1,501-2,500 ppm
  • Fatigue and reduced concentration
Very Unhealthy
  • CO2: 2,501-5,00 ppm
  • Headaches and adverse health effects expected
  • CO2: 5,001-10,000 ppm
  • Quickened breathing, nausea

Humidity sensor +/- 10% of actual value. Temperature +/- 1 C. The Node needs to run for 5 minutes to have a reliable humidity and temperature reading.

Air quality forecasts are generated by using machine learning, a subset of Artificial Intelligence, technologies. These predictions are derived from factors such as historical information, weather trends, wind movement, geography, human behavioral patterns and current air pollution readings in surrounding areas. By recognizing trends in past conditions and outcomes, our computers are able to predict future conditions. All of this information is provided on the device’s screen – as well as on our free app and website – so that users can plan ahead and optimize your well-being when outdoors.

**This forecasting model, and all resulting air quality predictions, is intended to provide accurate information related to air quality. Steps have been implemented to ensure its quality and accuracy – however, there are some limitations. Please read AirVisual’s air quality forecast method and disclaimer for more information.

The Atlanta Healthcare Airvisual Node is NOT waterproof; by design it needs air flow into the sensor.

Outdoors the Node should be sheltered from rain, wind and direct sunlight. Any caging or covering protecting the Node from these 3 elements, and allowing adequate airflow, should suffice.

The Node itself cannot be connected to a TV. Data can be displayed on televisions via an HTML based widget. The price of the Widget depends on the level of customization required.

3 nodes can be connected to a single account. For more, we will charge the enterprise fee.

Android, iOS, web-based. The app can be downloaded via the Apple App store, Google Play, or Android markets.

Without Wi-Fi connectivity there is no way for a Node’s data to sync with a phone. Both phone and Node must be connected to the internet by some means for data to be shared between the two devices.

You can follow the data from your friend’s, or anyone’s Node by ‘Adding’ their Node to your online profile (through the website or app). To do this you’ll need to ask the Node’s owner for their ‘share code’.

To find your Node’s share code, sign in to your profile on the AirVisual website. Once your Node has been added to your profile, click on your name tab and select ‘My Nodes’. On the desired Node, click on the ‘Share’ button in the top right corner. This will display the Node’s share code.

The Node stores data for up to 5 years. This data can be downloaded at any time by connecting to samba, and accessing the data from a computer. The data is downloaded as a .txt file, with comma-separated values. To get a PDF report, it is necessary to import this data into Excel or another program, and save as a PDF.

Alternatively, it’s possible to view value-added reports of your Nodes data, divided into days/months/years by going on the website. It’s technically possible to get this type of PDF report with customization and probably a fee.

Each Node can only be registered to one account (mobile phone is irrelevant, but the “owner” must be logged in). There is no limit, however, to how many user profiles can follow one Node.

Anyone with a Node and the AirVisual app is able to configure the Node’s Wi-Fi. Only one registered user account can control the Nodes settings through the app. There is no limit on how many user profiles can follow one Node, using the mobile app or website.

This is particularly useful to share a Node to the classroom of student’s parents.

A share code is a unique code for providing others access to the data on a given Node.

You can follow someone else’s Node’s data on the mobile app by: clicking the “+” on the top left of the app homepage, navigating to “Add a new Node” and then entering its share code.

To find your Node’s share code, sign in to your profile on the AirVisual website. Once your Node has been added to your profile, click on your name tab and select ‘My Nodes’. On the desired Node, click on the ‘Share’ button in the top right corner. This will display the Node’s share code.

There is no limit on how many user profiles can follow one Node.

Pairing mode is the term given to when the Node has activated its internal Wi-Fi hotspot. This is used when a user would like to configure the Node’s Wi-Fi through the mobile app. When a Node is in the Initialization Wizard (first time use), Pairing mode is automatically activated. If a user is not in the Init Wizard, they can cue pairing mode by holding down the center “ok / menu” button for 3 seconds.

Once the Node’s Wi-Fi has been successfully configured through the mobile app, the internal Wi-Fi hotspot will deactivate and the Node will exit pairing mode.

The Node is able to display data from any of the 8000+ outdoor air quality monitor stations listed – whilst this number is growing all the time, there are still large gaps in global air quality coverage. That is the problem we are addressing with our Nodes!

You can use your Node to monitor air quality anywhere, indoor or outdoor – as long as the Node remains protected from weather (wind, sun, rain, temp). The exciting thing about outdoor monitoring is that if you connect your Node to Wi-Fi, place it in a sheltered outdoor location (e.g. shaded and weather-protected windowsill or porch), you can choose to share your data and become a public air quality data source in your community.

We use Allwinner A33 microprocessor. We do not use Arduino.

We do not guarantee accuracy, usage or product protection above 40°C.

The Node can handle temperatures down to -10°C. Beyond -10°C Atlanta Healthcare Airvisual cannot guarantee the validity of the data shown, proper usage, or general protection of the Node’s hardware components.

When temperature is over 40°C Atlanta Healthcare AirVisual cannot guarantee the validity of the data shown, proper usage, or general protection of the Node’s hardware components.

Generally speaking, the Node may continue to work normally until about 50°C-60°C, at which point the Node will likely overheat and turn off. In many cases, it will regain functionality when temperatures decrease to within the range of -10 and 40°C. In some cases, the Node will be irreversibly damaged.

5” wide LED display screen, slightly larger than an iPhone 6, 800×480 pixels.

The box includes an outer box slip, box, 1 micro USB to USB cord, 1 power adapter, 1 Node, and 1 user manual.

Clean the Node’s exterior using a slightly damp cloth and use its power saving mode to extend the sensors lifetime. To remove the dust in the sensor, you can use compressed air spray to clear the dust from photosensor.

The Node can be used in moving vehicles, however, readings may be affected by strong winds, which deceive the sensors calibration for air volume. The most accurate readings will result when the Node is covered from wind (for instance, when the vehicle’s windows are rolled up). Using the Node inside the car with windows closed (no wind blowing on the sensor) is fine.

Yes. To change brightness levels, press the center “OK / Menu” button, then click Display > Screen > and adjust the brightness level.

No, the Node’s screen is meant for clean, clear display and as a result was not designed to be a touch screen.

No, additional sensors cannot be plugged into the Node. We strongly discourage all users from tampering with the Nodes internal components.

The Node has many different uses for organisations:

  • The Node can be used to monitor and improve the air quality in work spaces, enhancing productivity, concentration and morale.
  • Any business with customer interaction can display a Node at its counter, reception desk, or any other visible spot: this will add value to customer experience, convey an aligned mission for health and wellbeing, and drive a unique competitive advantage.
  • Businesses can also display the Node to show off their superior air quality, advertising their premises as healthy spaces.
    • Additionally, they can publish their Node’s share code, so that customers can follow the business’ indoor air quality – excellent additional advertising, and a constant reminder of the business on the customer’s phone (app).
  • Businesses can also use the Node as a public, outdoor air monitoring source, again generating broad advertising for their business on the global air monitoring network, and adding great value to their community, and customers. Particularly in areas with little air monitoring coverage.
  • Environmental / air quality organisations can use the Node as outdoor monitoring stations to generate air quality in areas with little coverage – as well as acquire and use this data with AirVisual’s API to create novel applications.

People spend over 90% of their time indoors, and indoor air quality is often as bad as, sometimes even worse than outdoor air quality. Knowing what’s in your home’s air is vital for ensuring the health of you and your family.

  • Monitors PM2.5, CO2, Temperature and Humidity
  • Contrasts real-time indoor with local outdoor air quality, offering tailored recommendations for you to optimize your activities in the healthiest environments, indoor and out.
  • Provides 3-day outdoor air quality forecasts, allowing you and your household to plan your activities for optimized health and wellbeing.
  • By monitoring PM2.5 levels, you can see how effectively your home is insulated against outdoor particulate pollution. High concentrations alert you to close windows, doors, and run an air purifier.
  • CO2 is an important indoor pollutant many people are unaware of. CO2 builds up in poorly ventilated spaces, and can cause headaches, lethargy, difficulty concentrating and even nausea. The Node alerts you when to open windows and ventilate your environment.
  • You can download historical data from your household’s Node to a computer, allowing further analysis of patterns and trends in your household’s air quality.
  • Poor air quality can negatively affect your sleep. Optimizing indoor air quality can energise your household.
  • Follow your household’s air quality data on-the-go using the mobile app.

Usually, the coverage of a Node is a room (or open space) of up to 100sqm.

You can use compressed air to blow away the dust from the sensor. Apart from that, the internal components of the Node should never be disassembled or tampered with.

Do: Put the Node on a flat, stable surface; Clean the Node using a slightly damp cloth; Connect the Node to an electrical outlet; Extend the sensors lifetime by using power saving mode.

Don’t: Expose to direct sunlight (even indoors); Expose to water (eg. rain) the Node is not waterproof; Expose to strong wind; Expose to extreme heat.

+/- 10% of actual concentration value

  • The Node is not guaranteed to work above temperatures of 40-50°C, or below -10°C
  • The Node’s monitoring may lose effectiveness if exposed to weather elements, such as: rain/water, strong wind, sunlight, extreme heat.

The Node does store data. It’s cache memory is quite large, capable of holding up to 5 years of memory. To clear the data click the center “OK / Menu” button, and then navigate to About > Node reset > “Reset settings & clear data”

The Node reports outdoor air quality data as it is reported from official monitoring stations around the world (eg. US Embassy). Depending on the Node’s settings, this data can be displayed on the Node in either US AQI or China AQI.

It is worth noting that before to be published, the data goes through a validation process to remove any potential data point outliers.

  • Personalized recommendations based on BOTH indoor and outdoor pollution conditions so user can optimize health and wellbeing.
  • The only device to display air quality forecasts on the screen
  • Has a battery and a memory to store the measurements, so that it can be used remotely- useful for experiments
  • Measures CO2, allowing users to understand how to best balance PM2.5 & CO2 (an unfortunate result of sealing your home and running air purifiers)
  • Compares indoor and outdoor AQ clearly on screen
  • Power saving mode
  • Excellent data capacity – device can log < 5 years’ data. Easily accessible and downloadable to a computer
  • Optimizes measuring precision by using algorithms to discount outlying data points, as well as account for the influence of temperature and humidity on sensor readings.
  • High precision laser sensor with airflow control fans for better accuracy
  • The Node is the only air quality monitor to directly measure both PM2.5 and CO2, as well as offer AQ forecasts on-screen
  • Personalized recommendations based on BOTH indoor and outdoor pollution conditions so user can optimize health and wellbeing.
  • Only device to compare indoor and outdoor data from locations worldwide on-screen

Rechargable Li-Ion battery

The Node’s battery life will vary depending on its settings. In standard use, a Node will run for 4-5 hours. To extend the battery life of the Node:

  1. Change the screen brightness (press the center “ok / menu” button, navigate to Display > Screen > Brightness) or turn the screen off by pressing the far left button (quick press)
  2. Adjust power saving mode preferences so that the Node enters “sleep mode” at given times (press the center “ok / menu” button, Navigate to Performance > Power Saving > and change settings as you wish)
  3. Change the frequency at which the Node measures air quality (press the center “ok / menu” button, Navigate to Performance > Sensor mode > Default)

The sensor’s efficiency may be negatively affected if the Node is exposed to certain weather elements (such as rain, wind, high temperatures and direct sunlight). However, if the Node is placed in a sheltered location (e.g. shaded porch, roofed balcony), and has battery life or a power source, then sensor efficiency should function as normal.

The charger is 5V, 1amp minimum. There is a overcurrent protection for 3A.

Atlanta Healthcare AirVisual uses a high precision laser with a photo sensor to count PM2.5 in the air. This data is then calibrated using a unique algorithm to calibrate for external factors such as temperature, humidity and outliers via the internal CPU.

Under normal usage, a PM2.5 sensor should not require recalibration or replacement for the first year. Depending on the user’s demand for precision, the sensor replacement can be offered as a service.

Our CO2 sensor is an Infrared gas sensor (NRID) the components of which include an infrared source, light tube, interference filter and infrared detector.

Swedish made CO2 sensor

Yes, Nodes with VOC sensors will be offered in the near future. VOC sensors will not be built into existing Nodes.

The Node itself cannot be connected, directly, to a television display. Digital signage relies on an HTML based widget, provided by AirVisual.