The Windmill Air Purifier sits toward the premium end of the market and is the smaller of the two air purifiers in Windmill's lineup, designed for small to medium-sized rooms. It uses a 3-in-1 filtration system consisting of a pre-filter, a particle filter, and an activated carbon sheet to help remove airborne particles and reduce odors. It also features an air quality sensor with automatic fan adjustment, dedicated sleep modes, and app connectivity for remote control, scheduling, and air quality monitoring.
Our Verdict
The Windmill Air Purifier is a good choice for homes with pets. Its three-stage filter captures pet hair, dander, and other airborne particles. It also runs quietly on its lower fan settings, which is a plus around skittish pets that may be sensitive to sudden or persistent noise. The washable pre-filter is easy to maintain, since accumulated pet hair and debris can simply be vacuumed away.
Exceptionally quiet operation.
Good air-cleaning performance at lower noise levels.
May struggle to keep up in larger spaces with multiple shedding pets.
The Windmill Air Purifier is well-suited to bedrooms. It runs exceptionally quietly on its lower fan settings, including dedicated Sleep (Whisper) and Sleep (White Noise) modes, and the display can be turned off completely to avoid disturbing you. Eco mode automatically adjusts the fan speed based on air quality, while scheduling in the app lets you set it to run at specific times without manual adjustments. If you want to keep it on its quieter settings, it's best suited to small and medium-sized rooms, where it can maintain effective filtration without needing to ramp up to louder fan speeds.
Exceptionally quiet operation.
Good air-cleaning performance at lower noise levels.
Compact design works well in small to medium-sized rooms.
Good range of app-based controls and scheduling options.
Some controls are only accessible through the app.
The Windmill Air Purifier delivers decent air cleaning performance on its Boost setting and is best suited to medium-sized rooms. It provides enough airflow to effectively filter the air in typical bedrooms, offices, and living spaces, though larger rooms and more open-concept rooms will take longer to fully clean.
Good air-cleaning performance at lower noise levels.
Not ideal for cleaning large, open-concept spaces.
The Windmill Air Purifier has a fairly compact footprint that doesn't take up much floor space, making it easy to tuck beside a bed, couch, or desk without disrupting the room's layout. Its slim profile also means it fits naturally into smaller bedrooms, home offices, or apartments where space is tight.
Compact design works well in small to medium-sized rooms.
Check Price
Differences Between Sizes And Variants
The Windmill Air Purifier is available in five colors: White, Navy, Sage, Sand, and Coral. We bought and tested a unit in Sand, though we fully expect the other versions to perform identically. For those interested, here's the product label for our test unit.
If you come across another variant of this air purifier, let us know in the comments so that we can update our review.
Popular Air Purifier Comparisons
The Windmill Air Purifier is the smaller of Windmill's two air purifiers and is intended for small to medium-sized rooms where a compact footprint is useful. It offers stronger particle filtration and broader room coverage than the Levoit Core 200S, and adds an onboard air quality sensor with automatic Eco mode. The Levoit is smaller and easier to fit on a desk or nightstand, and its much lower price also makes it possible to buy multiple units for roughly the cost of a single Windmill. The Windmill also stays noticeably quieter at its highest fan speed than the Winix C610, but it gives up a fair amount of air-cleaning power in return, so the Winix is better suited to larger rooms. Against the Blueair Blue Signature Small, the Windmill is less powerful, a little larger, and not quite as quiet overall, but it avoids the Blueair's ionization system, which can't be disabled. The Windmill also offers more comprehensive onboard controls than the premium Dyson HushJet, making common adjustments easier without reaching for your phone, though the Dyson is smaller, quieter, and uses a much longer-lasting main filter.
If you're interested in alternatives, check out our recommendations for the best quiet air purifiers, the best air purifiers for pets, and the best air purifiers for bedrooms.
The Windmill Air Purifier and Dyson HushJet are aimed at very similar usages, with both being compact, premium-feeling options designed primarily for smaller rooms and users who care about how an air purifier looks in their space. Their overall performance is also quite similar, so the choice largely comes down to design and usability preferences. The Dyson has a slightly smaller footprint and a more minimalist design, while the Windmill offers more comprehensive onboard controls and comes in a wider variety of colors, giving you more flexibility to match your decor.
The Windmill Air Purifier is the better choice than the Levoit Core 200S if you want stronger particle filtration, better room coverage, and an onboard air quality sensor with automatic Eco mode. The Levoit, however, is significantly more affordable, allowing you to place multiple units around your home for roughly the price of a single Windmill. It's also more compact, making it easier to fit on a desk or nightstand.
The Winix C610 is the better choice than the Windmill Air Purifier if you need stronger air cleaning in medium to large rooms. It delivers substantially higher particle filtration performance and broader room coverage, making it a better fit for larger living spaces. The Windmill has the advantage when it comes to noise, though, staying much quieter at its highest fan speed. Unlike the Windmill, the Winix uses ionization technology via its PlasmaWave feature, which can be turned off if you prefer not to use it.
The Blueair Blue Signature Small is a better overall performer than the Windmill Air Purifier. It delivers stronger particle filtration, covers slightly larger areas, operates more quietly, and has a smaller footprint, giving you greater cleaning performance without taking up as much space. The Windmill still holds a few usability advantages, including dedicated Whisper and White Noise sleep modes and a display that can be turned off completely. It also avoids ionization entirely, whereas the Blueair's HEPASilent system relies on ionization that can't be disabled, which may matter if you'd rather steer clear of that technology because of ozone sensitivity.
Test Results
The onboard air quality indicator changes color based on current air quality conditions:
- Green: Good
- Yellow: Moderate
- Peach: Bad
- Red: Unhealthy
The Windmill Air Purifier has simple onboard controls for power, fan speed, Sleep mode, and Eco mode. There are six fan speeds in total: Sleep (Whisper), Sleep (White Noise), Low, Medium, High, and Boost. Eco mode works as an automatic setting, using the built-in air quality sensor to adjust the fan speed as conditions change. It also has an onboard filter replacement indicator.
There's no physical remote, but the Windmill app gives you access to air quality monitoring, fan speed and mode controls, schedules, timers, display brightness controls (including the option to turn the display off completely), remote operation, and a child lock through your smartphone. You can watch our app tour video for a closer look at the interface and available features.
The Windmill Air Purifier uses a 3-in-1 filter that combines a pre-filter, a main particle filter, and an activated carbon sheet into a single replaceable cartridge. Windmill describes the main filter as a medical-grade H13 HEPA filter, but since the company doesn't specify how it was tested or where the certification was obtained, we don't mark it as HEPA-certified in our testing. The pre-filter captures larger debris like dust, pet hair, dander, and lint, while the activated carbon layer is designed to help reduce smoke, odors, and VOCs. It's worth noting that activated carbon filters are only effective at reducing odors and gaseous contaminants when they contain sufficient carbon. You can learn more about this in our research on air purifier performance.
Windmill recommends vacuuming the pre-filter once a month and replacing the full filter every six months. The replacement 3-in-1 filter can be purchased directly through Windmill's website.
Using its Turbo setting, this air purifier delivers decent air-cleaning performance best suited to medium-sized rooms. It provides enough airflow to effectively filter the air in typical bedrooms, offices, and living spaces, though it'll take longer to clean the air in larger rooms.
This air purifier delivers good air-cleaning performance while keeping noise levels low. At a comfortable noise level, it's best suited to small and medium-sized rooms, making it a good choice for bedrooms, home offices, and similar spaces. If you're using it in a larger room, you'll need to run it at a higher fan speed to achieve the same level of air cleaning.
This air purifier runs exceptionally quietly, making it a great fit for bedrooms, nurseries, or home offices. At its lowest speed, it's barely more than a whisper, and even at higher settings, it stays closer to a quiet conversation than to a disruptive noise. Only on the highest Boost setting does the fan become noticeably louder.