10 Best Air Purifiers 2025 in the United States

The Shark HP152 air purifier is designed for large rooms up to 650 square feet, making it a solid choice for living rooms, basements, or larger bedrooms. It stands out with its NeverChange HEPA filter, which lasts up to 5 years without replacement, saving you money and hassle compared to regular filters. This filter captures 99.98% of dust, allergens, and even very small particles, exceeding typical HEPA standards. It also has a Debris Defense pre-filter that's washable and easy to clean, helping extend the main filter's life. Shark’s Clean Sense technology automatically adjusts fan speed based on detected air quality, which is a useful feature to maintain clean air efficiently without manual control. Noise levels are low enough for quiet environments and come with dimmable lights, which is helpful for bedrooms. At 26 watts, its energy consumption is modest for its size and capabilities.

One nice addition is the odor neutralizer that helps reduce smells effectively, adding to a fresher indoor environment. On the downside, while it covers a large area well, it may not be as powerful in spaces larger than 650 sq. ft. Also, some users might find the unit's size a bit bulky compared to more compact models. Maintenance is easy thanks to the washable pre-filter and long-lasting HEPA filter, making this purifier convenient for those who want strong air cleaning without frequent filter changes.

For those seeking a reliable, low-maintenance purifier suitable for big rooms with additional odor control, the Shark HP152 is a worthwhile option.

The LEVOIT Vital 100 air purifier is a strong candidate for anyone needing clean air in medium to large rooms, covering about 788 square feet. Its Clean Air Delivery Rate (CADR) of 105 cubic feet per minute means it efficiently filters smoke, dust, pollen, and pet hair, making it suitable for allergy sufferers and pet owners. The 3-stage filtration system combines a washable pre-filter, an efficient fine particle filter, and an activated carbon layer, which helps remove odors and airborne particles effectively.

One of its standout features is its quiet operation; at only 24 decibels, it won’t disturb your sleep, and you can turn off the display lights for added nighttime comfort. It’s also energy efficient, costing roughly $1.66 per week to run continuously, which is budget-friendly. Filter replacement is straightforward, recommended every 6 to 8 months, with a helpful indicator to remind you when it’s time. The compact design with top air vents lets you easily place it near walls or corners without sacrificing airflow.

On the downside, this model requires using only Levoit’s original filters, which might limit options and potentially increase costs. Though the unit is well-designed for homes, it might be less ideal for very large open spaces or those requiring ultra-high CADR numbers. Also, maintenance involves regular cleaning of the outside filter surface with a brush or vacuum, but not washing the internal filters, which some users might overlook. The Vital 100 works well for bedrooms, living rooms, or offices where quiet, effective air purification is key. Its ease of use, reliable performance, and thoughtful features make it a solid choice for improving indoor air quality without complicated setup or operation.

The KNKA APH4000 air purifier is designed for large spaces, covering up to 3,500 square feet, making it a solid choice for big rooms or open living areas. Its AHAM certification and high Clean Air Delivery Rate (CADR) mean it effectively removes common indoor pollutants like dust, pollen, smoke, and pet dander at a good speed. The purifier uses a thorough 3-stage filtration system combining a washable pre-filter, True HEPA filter, and activated carbon filter. This setup captures everything from large particles to microscopic allergens and odors, which is excellent if you have pets or allergies. It also features dual air intakes and outlets, helping the air circulate quickly and evenly.

One of its user-friendly features is the real-time air quality display with color indicators, allowing easy monitoring of air cleanliness at a glance. It offers multiple modes including a quiet Sleep Mode (around 22-24 dB), an energy-saving ECO mode, and a Pet Mode that increases airflow to clear pet hair and odors more quickly. The filter replacement indicator helps you stay on top of maintenance, with filters needing changes every 3 to 6 months for best results.

On the downside, while it covers large areas, the purifier is somewhat larger and heavier than some compact models, which might be less convenient for frequent moving. Also, replacement filters are specific to this brand, so ongoing costs and filter availability should be considered. Noise levels remain low in Sleep Mode, but at higher fan speeds, the sound might be more noticeable. This air purifier is an excellent choice for those needing reliable, strong performance in large rooms, especially pet owners or allergy sufferers seeking thorough, fast air cleaning combined with smart features and easy monitoring.