Dhaka, Bangladesh’s bustling capital, consistently ranks among the world’s most polluted cities, with an alarmingly high Air Quality Index (AQI) that classifies it as "very unhealthy." While improving the city’s air pollution is a long-term challenge, we can take immediate steps to enhance indoor air quality. Investing in a reliable air purifier is an effective way to breathe cleaner air at home or in the office. This guide covers popular air purifier models, price ranges, and tips to help you make the right choice.
What is an Air Purifier?
Air purifiers are home appliances that circulate and purify the air in an enclosed area, such as a room or a theatre. Air purifier devices use two oppositely directed channels to pull in polluted air and push it out after filtering. They use filtration technologies like HEPA filters and depolluting agents like active oxygen to clean the air.
Benefits of Air Purifier
Breathing into clear air has tremendous health benefits, as most chronic diseases occur from inhaling polluted, dusty air. Installing an Air Purifier in your room will:
Remove Allergens: Allergens in the air trigger symptoms like sneezing, congestion, watery or itchy eyes, a runny nose, phlegm in the throat, rashes, and a sore throat. Air Purifiers reduce the allergen load of a room’s air to a harmless level.
Reduce Asthma Triggers: HEPA filters are tested and certified for removing about 99.97% of pollen, dust, and different airborne particles that trigger asthma-related difficulties.
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Reduce Airborne Pathogens: Purifiers with HEPA filters can catch bacterial and viral pathogens on a large scale and free the indoor air from epidemical contamination like COVID and HMPV.
Filter Odours and Harmful Gases: Human living spaces can be odorous for many reasons and generate deleterious gases. A purifier can be a lifesaver, removing those odors and gases from the air.
Tips for Choosing an Air Purifier for Your Home or Office
Buying an air purifier may not give you the expected protection if not chosen carefully. There are key choices and considerations that a buyer must make before making the buying decision:
Frequency and Cost of Replacing a Filter
Filters require replacement after 6 or 12 months of regular use; for activated carbon filters, the duration is 3 months. Most purifiers provide indicator lights to show the condition of a filter and warn about an imminent replacement. However, you must learn about different filters, costs, and the average replacement frequency to find the one suitable to your budget.
Clear Air Delivery Rate (CADR)
This measure indicates the amount of air a purifier cleanses at its highest capacity. For example, a purifier with a CADR 250 for gases will reduce the amount of harmful gas to a level that is only possible by replacing 250 cubic feet of contaminated air with the same volume of fresh air. The higher the CADR number, the more powerful and faster the purifier is.
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Room Size
Measuring your room’s size beforehand will help you pick the right purifier to cover that room’s space. However, manufacturers often claim more than the actual capacity of their purifiers. As a buyer, you should research well, talk to existing users, check reviews on different platforms, and make sure that your chosen purifiers do what they say.
Noise
A noisy Air Purifier is difficult to live with as it can disrupt the peaceful environment of your room. Check the decibel level of a device on its packaging before buying it.
Types of Filters
There is no single Air Purifier to filter all sorts of pollutants; some are designed to catch biological pollutants like dust and pet dander, and some filter chemical pollutants like carbon monoxide. Air Purifiers can be of different types based on their filtering technologies.
Mechanical Filters: These purifiers use fans to force air through a dense web of fine fibers that catch particles. HEPA filters are an example of a quality fiber web with the finest mesh, as they can catch both microscopic and large particles. Mechanical filters can’t filter gases or odors.
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Carbon Filters: Purifiers using activated carbon filters are effective against certain types of gases except ammonia, formaldehyde, or nitrogen oxide. They can also remove odorous particles from the air. Many air filters come with both mechanical and activated carbon filters to provide increased protection. However, carbon fibers get saturated easily and need frequent cleaning or replacement.
Ozone Generators: These devices use ozone to alter the chemical composition of certain pollutants. They may show results in some cases but are not recommended for indoor use as they can make the air quality more dangerous.
Electrostatic Ionizers: Some purifiers use electrostatic models to charge aerial particles and create a magnetic effect to stick those particles on nearby surfaces or plates attached to the purifiers. These purifiers are also not recommended as they often produce ozone.
Ultraviolet Germicidal Irradiation (UVGI): Many purifiers nowadays come with UV lamps to kill airborne pathogens. This feature may increase a purifier's protective measure, but it is often not necessary.
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Photocatalytic Oxidation PCO: Photocatalytic oxidation is also about reacting with harmful pollutants to make them ineffective. But the process may also create harmful byproducts so are not recommended.
Best Air Purifiers Available in Bangladesh in 2025
Most electronic home appliance manufacturers make air purifiers and market them at different prices based on their designs, capacities, and filtration technologies. Here are a few notable air purifiers available in Bangladesh:
Low Range
BEKO Air Purifier P6
BEKO Air Purifier P6 is a simple-looking air-purifying device made by Singer. It features a CADR of 204 m³/hour and a 3-stage filtration system combining a HEPA 13 filter, an activated carbon filter, and a simple pre-filter. The purifier can clean a 323-sf area in 27 minutes and is available for BDT 9,038.
Xiaomi Smart Air Purifier 4 Lite with Google Assistant
Xiaomi Smart Air Purifier 4 Lite cleans the air in a 120-square-meter room in only an hour. It comes with a CADR of 360m³/h and captures air particles as small as 0.3 microns. It produces low sound, measured at only 33.4dB, which feels more like a whisper. A PM2.5 sensor monitors the inhouse air condition and lets users know when it needs a purification. The purifier is available in Bangladesh at approximately BDT 17,200.
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Mid Range
Philips AC0650 44m² Air Purifier
The Philips AC0650 offers air purification for rooms up to 44 m². It features a CADR of 170 m³/h, ultra-quiet operation (19 dB), Wi-Fi connectivity via the Air+ app, and a compact design. It uses a dual filtration system combining HEPA and pre-filter filters. The purifier is available at BDT 24,790.
