Rain has brought temporary relief from air pollution across Delhi-NCR, with the Air Quality Index (AQI) dropping to 133, but forecasts indicate that poor and very poor air quality could return over the following days. The improvement has renewed attention on indoor air quality ahead of winter, when pollution levels typically become a concern for residents. For households considering an air purifier, factors such as Clean Air Delivery Rate (CADR), room coverage, filtration technology and replacement-filter costs are important when comparing available models.

Six air purifiers highlighted for different room sizes and budgets include the Qubo Q200, Philips AC0920/60, Xiaomi Mijia Smart Air Purifier 6, Honeywell Air Touch V1, Eureka Forbes Air Purifier 355 and Coway Airmega 150. Their listed prices range from ₹4,999 for the Honeywell model to ₹14,999 for the Coway purifier, although prices and discounts may vary across retailers. The models differ in airflow capacity, filtration systems and monitoring features, making it important to match a purifier to the intended room rather than selecting one based solely on its discount or brand.

The Qubo Q200 and Honeywell Air Touch V1 are designed for smaller spaces, with listed CADR figures of 150 cubic metres per hour and 152 cubic metres per hour, respectively. The Qubo model covers up to 200 square feet and includes a five-stage filtration system, app control and a stated filter life of up to 9,000 hours. Honeywell's purifier covers up to 235 square feet and combines a pre-filter, H13 HEPA filter and activated carbon layer. These compact models may suit bedrooms or study rooms, but their relatively modest airflow capacity makes room size an important consideration.

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For bedrooms where quiet operation matters, the Philips AC0920/60 offers a listed CADR of 250 cubic metres per hour and coverage of up to 30 square metres. Its features include a PM2.5 sensor, HEPA NanoProtect filtration and a Sleep Mode rated at 20.5 decibels. The Xiaomi Mijia Smart Air Purifier 6 is the higher-capacity option in the comparison, with a stated particle CADR of 443 cubic metres per hour and coverage ranging from 312 to 538 square feet. It also offers PM1 and PM2.5 monitoring, app connectivity and voice control, although buyers should verify the exact model and specifications before purchasing.

The Eureka Forbes Air Purifier 355 and Coway Airmega 150 offer alternatives for medium-sized and larger rooms. Eureka Forbes lists a CADR of 355 cubic metres per hour and coverage of up to 480 square feet, alongside True HEPA H13 filtration, a PM2.5 display and Auto Mode. Coway's Airmega 150 has a CADR of 303 cubic metres per hour and stated coverage of 355 square feet. Its features include a washable pre-filter, a carbon filter, True HEPA filtration and automatic fan-speed adjustment based on indoor air quality. Both models require periodic filter maintenance, which contributes to their long-term running costs.

When choosing an air purifier for Delhi-NCR homes, buyers should prioritise CADR and room coverage, then compare filtration systems, noise levels, power consumption and replacement-filter availability. A HEPA filter helps capture fine airborne particles, while activated carbon can help reduce certain odours and gases. Air quality indicators and automatic operating modes can make monitoring more convenient, but the purifier must still provide sufficient clean-air delivery for the space. With winter pollution potentially returning, comparing the full cost of ownership and checking current prices and specifications can help households select a suitable model.

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