In autumn and winter, temperatures fluctuate between hot and cold, and the smog season returns again. With the combined impact of cold air and pollution, opening windows for ventilation has become more like a "hope" than a routine. So, how can you keep your indoor air clean? An air purifier is essential. When choosing an air purifier, there are four key indicators to consider: 1. Clean Air Delivery Rate (CADR); 2. Cumulative Cleanliness Measurement (CCM); 3. Noise level; and 4. Energy efficiency ratio. Below are some top models that might suit your needs perfectly. ![Air Purifier Image](http://i.bosscdn.com/blog/15/11/75/3353764.jpg) **Lake AP50 Air Purifier** This model is designed for fast removal of dust mites and long-lasting elimination of formaldehyde. It uses high-efficiency centrifugal technology and low-resistance composite HEPA filters to deliver a large CADR of 450m³/h. Its innovative formaldehyde decomposition technology, combined with ultra-microporous activated carbon, breaks down formaldehyde into carbon dioxide and water. The CCM for formaldehyde is as high as 3500mg. Additionally, it reduces energy consumption and noise by optimizing airflow and increasing the intake area. ![Lake AP50 Image](http://i.bosscdn.com/blog/15/11/75/3011329.jpg) **Samsung KJ393G-K5050WD Air Purifier** This Samsung air purifier not only looks stylish but also offers smart features. It meets P4 for particle filtration and F4 for formaldehyde removal, making it highly efficient. It supports mobile app control, real-time air quality monitoring, scheduling, and child lock functions. It even alerts you when it's time to replace the filter. Plus, its hidden wheels make it easy to move around. ![Samsung KJ393G Image](http://i.bosscdn.com/blog/15/11/75/3097129.jpg) **Yadu KJ500G-S5 Air Purifier** This dual-sided air purifier is ideal for tackling indoor decoration pollutants. With a CADR of 500m³/h, it can refresh your room in just 10 minutes. It’s known for its high efficiency and quiet operation. It also supports app-based remote control and real-time air quality monitoring. ![Yadu KJ500G Image](http://i.bosscdn.com/blog/15/11/75/3159937.jpg) **Honeywell KJ410F-PAC000AW Air Purifier** This compact and energy-efficient model weighs only 8.15kg, making it easy to move. It achieves F2 for gaseous pollutants and P3 for particulates, which is sufficient for most homes up to 40 square meters. With an impressive energy efficiency ratio of 7.59, it’s a great choice for those looking to save on electricity bills. ![Honeywell KJ410F Image](http://i.bosscdn.com/blog/15/11/75/3221405.jpg) **Sharp KC-Z380SW1 Air Purifier** What sets this Sharp model apart is its built-in humidification function. It offers four key advantages: 1. Plasmacluster technology that generates negative ions to purify the air naturally; 2. a unique air circulation system with a 20° angled outlet and wide front/back intake for faster air movement; 3. triple-layer filtration; and 4. natural vaporization without water mist, keeping the air moist without dampness. ![Sharp KC-Z380SW1 Image](http://i.bosscdn.com/blog/15/11/75/3265895.jpg) After reviewing these options, you may already have a clear idea of what suits your needs best. Now it's time to take action—invest in a reliable air purifier and protect your health during the smog season!

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