If the extra pollen of spring allergy season has your eyes watering and nose itching, now’s a good time to snag an air purifier. The Blueair Blue Pure 511i Max—our pick for best smart air purifier in Popular Mechanics’ tested roundup of the best air purifiers—is currently discounted by 20 percent on Amazon. Typically $140, it’s now $112, saving you $28.
Designed for small living areas and bedrooms, the 511i Max keeps a low profile but delivers strong performance where it counts. In our testing, it stood out for its ability to clean air quickly without the constant background roar that comes with many purifiers in this size range. It’s recommended for rooms up to 926 square feet.
Now 20% Off
The impressively quiet operation is thanks to Blueair’s HEPASilent filtration system. It pairs mechanical and electrostatic filtration to capture fine particles like dust, smoke, pollen, and pet dander while delivering quieter operation than traditional HEPA-only units.
What we loved about this air purifier is how seamlessly it blends into the home. It’s compact enough to sit on a nightstand, and its 360-degree air intake means you don’t have to be overly precise about placement. It’s the kind of device you can set and forget but, if you want more control, the built-in smart features are genuinely useful rather than gimmicky. Through the model’s app, you can monitor air quality in real time, adjust fan speeds, and set schedules, while an automatic mode responds dynamically to changes in the air without constant input.
In testing, we found it especially effective in smaller spaces where consistent air circulation matters more than power. It’s not meant to replace a large-room unit, but for targeted use, like bedrooms during allergy season or keeping pet dander in check, it hits a sweet spot.
For anyone looking to improve indoor air quality without committing to a bulky or overly expensive system, this is an easy recommendation.
Best Portable
Now 35% Off
Best Value
Now 17% Off
Best for Pets
Now 11% Off
Best for Large Rooms
Now 41% Off
Best Filtration
Now 23% Off
Sarah Connor is a Reviews Editor for Popular Mechanics. She also contributes to Runner’s World, Bicycling, Best Products, and Biography.com. Before joining the Hearst Magazines team, Sarah was a National Content Editor for Hearst Television. She holds a master's in Journalism from Syracuse University and a dual bachelor's in English and Communications from the University of Pittsburgh. When she isn’t writing up a review of the newest gadgets, you can find her heading to the nearest rink for a figure skating session or enjoying the outdoors with her beloved Australian Shepherd, Rosie.
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