Winix AT40 Air Purifier
- 1,968 sq ft cleaned in one hour
- True HEPA plus carbon and pre-filter, 0.01 micron
- 99.99% of airborne particles removed
- 23.5 dB noise level, 42 watts
- Smart Sensor, Auto mode and WiFi app control
- 7 lb, 10.45 x 10.45 x 19 inches
Updated 23 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A compact tower purifier for a large room, with a sensor, Auto mode and an app that tracks filter life. Odor handling comes from a carbon filter, so heavy smoke removal depends on the room size.
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ASIN: B0H42MNX67Model: AT40
Overview
Stacked pre-filter, True HEPA and carbon stages draw air through a round tower from every side. A built-in Smart Sensor reads air quality and shows it on the unit, and Auto mode changes fan speed on its own. The WiFi connection links to the Winix Smart App.
The AT40 pairs coverage for an extra-large room with a low listed noise level, and its app shows air quality and filter life. The limitation is the PlasmaWave feature, which the maker only says may reduce pollutants, so lean on the filters for results.
Who it's for
Households with shedding pets, seasonal pollen or smoke from nearby sources can set it to Auto and let the sensor adjust. A user who wants a bare-bones purifier with no WiFi will pay for features they skip.
Pros and cons
- Covers extra-large rooms
- True HEPA with carbon filter
- Auto mode adjusts fan speed
- Low noise rating for sleep
- PlasmaWave benefit is only described as possible
- Replacement filter schedule not listed
- Fan airflow rating not listed
Performance notes
Air passes through the pre-filter for large debris, the True HEPA layer for fine particles and the carbon layer for odors. The sensor reads particle levels and the fan speeds up or slows down in Auto mode. Coverage figures assume the full hour, so a large room cleans fastest at higher fan settings.
Specifications
| Brand | Winix |
|---|---|
| Model | AT40 |
| Dimensions & fit | |
| Item Dimensions D X W X H | 10.45"D x 10.45"W x 19"H |
| Item Weight | 7 pounds |
| Particle Retention Size | 0.01 micron |
| Capacity & performance | |
| Noise Level | 23.5 db |
| Power & efficiency | |
| Power Source | air_powered |
| Wattage | 42 watts |
| Construction & materials | |
| Color | White |
| Included components | |
| Unit Count | 1 Count |
| Warranty & support | |
| Software Update Supported To Date | unknown |
| Warranty Description | 2 Years Limited Warranty |
| Other details | |
| Contaminant Filtration Capability | Dust, Odors, Pollen, cigarette_smoke, pet_dander |
| Control Method | Touch |
| Filter Type | HEPA |
| Floor Area | 1968 square_feet |
| Item Type Name | Air Purifier Filter |
Frequently asked questions
How tall is the Winix AT40?
It measures 19 inches high and 10.45 x 10.45 inches at the base, and weighs 7 pounds.
Does the Winix AT40 remove cigarette smoke and pet dander?
The listing names dust, odors, pollen, cigarette smoke and pet dander among its filtration targets.
Can I control the AT40 from my phone?
Yes. The WiFi feature connects it to the Winix Smart App for air quality, controls and filter life tracking.
Is the AT40 only a filter?
No. It is the complete purifier tower. The three filter stages are included, and the unit also has fan, sensor and touch controls.