By Mohit Anand


With 1.4 billion people exposed to hazardous levels of particulate matter (PM2.5), India’s air quality crisis poses severe risks to public health and the economy. As the world’s second most polluted nation, India faces profound health and economic challenges due to worsening air quality. 


While much attention is given to outdoor pollution, indoor air quality (IAQ) is equally critical, particularly because people spend significant time indoors. Poor IAQ can lead to a range of health issues, from respiratory problems and allergies to long-term conditions such as asthma and chronic obstructive pulmonary disease (COPD). 


The impact is even more pronounced in homes with vulnerable populations like young children, the elderly, or individuals with pre-existing health conditions.


In this context, maintaining clean air indoors becomes not just a matter of comfort but a necessity for safeguarding health. An air purifier can be a powerful tool in mitigating the effects of indoor pollutants, but selecting the right one requires a clear understanding of your specific needs and the pollutants you are dealing with. Making an informed purchase ensures that your home remains a safe and healthy environment amidst the broader air quality challenges faced by the country.


Understanding Air Purifiers


An air purifier improves indoor air quality by eliminating contaminants such as dust, pollen, pet dander, and smoke. It functions by drawing in air, filtering out pollutants, and releasing cleaner air back into the room. Widely used in homes, offices, and other indoor spaces, air purifiers effectively reduce allergens, smoke, mould spores, bacteria, and viruses. This continuous filtration process fosters a healthier living environment, making air purifiers particularly valuable for individuals with allergies, asthma, or respiratory conditions.


As awareness grows, so does the demand for effective air purifiers. However, with a myriad of options available, selecting the right air purifier can be a daunting task. This guide aims to simplify your decision-making process by providing a comprehensive overview of what to look for when purchasing an air purifier for your home.


Essential Factors To Consider When Choosing An Air Purifier


Choosing the right air purifier involves several key considerations to ensure it meets your specific needs. Here are some steps to guide your decision:



  • Evaluate the Room Size: Choose an air purifier that is appropriate for the size of the room where it will be used. Check the manufacturer's specifications for the recommended room size and ensure the device can handle that space efficiently.

  • Check the CADR Rating: The Clean Air Delivery Rate (CADR) measures how quickly and effectively the purifier cleans the air. Higher CADR ratings indicate better performance in removing specific pollutants.

  • Consider Filter Types and Maintenance: Look at the types of filters used and their replacement frequency. HEPA filters are effective for particulate matter, while activated carbon filters handle odours. Some models have washable filters, which can reduce long-term costs.

  • Assess Noise Levels: Consider the noise level of the air purifier, especially if it will be placed in a bedroom or office. Many models offer a range of settings to balance performance and noise.

  • Check Energy Efficiency: Look for energy-efficient models to minimise electricity costs. Energy Star-rated purifiers are a good choice for ensuring lower energy consumption.

  • Smart Features and Connectivity: Modern air purifiers come equipped with smart features such as air quality sensors, auto-mode, and app connectivity for remote control. These features add convenience and allow you to monitor air quality in real-time.


Types Of Air Purifier Filters And Their Functions



  • HEPA Filters: High-Efficiency Particulate Air (HEPA) filters are among the most effective at capturing tiny particles. They can trap 99.97% of particles as small as 0.3 microns, making them ideal for removing allergens and dust.

  • Activated Carbon Filters: These filters are great for removing odours, smoke, and volatile organic compounds (VOCs). They work by adsorbing these chemicals onto the carbon surface.

  • UV-C Light Purifiers: UV-C light purifiers use ultraviolet light to kill bacteria, viruses, and mold spores. They are often used in combination with other filters.

  • Ionizers: These devices release negative ions into the air, which attach to particles and cause them to fall out of the air. While they can be effective, they may produce ozone, which can be a concern in high concentrations.


Choosing the right air purifier is essential for improving indoor air quality and protecting health, especially in highly polluted regions like India. Understanding filter types and key features will help you make an informed decision. For those with allergies, asthma, or respiratory conditions—or anyone in areas with poor air quality—investing in an air purifier is a smart way to promote better health. 


(The author is the Co-Founder & CEO, Secure Connection Ltd.)


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