What can we help you find?
This Winix AM90 review covers the published specs, certifications, filter costs and owner experience for Winix’s Wi-Fi tower purifier. In brief, the AM90 is a capable choice for rooms up to about 373 square feet, with AHAM Verified CADR ratings and app control. It costs more than the C545 with slightly lower CADR, so it makes the most sense when it is on sale.
Winix AM90 review: the verdict
The Winix AM90 is a tall, app-connected tower built on Winix’s familiar four-stage design. It carries AHAM Verified CADR ratings of 230 for smoke, 233 for dust and 240 for pollen. Its verified room size is 373 square feet.
It is CARB listed and comes with a two-year warranty. It also uses Winix Filter A, one of the brand’s most widely sold filter sets. That makes replacements easy to find.
The catch is value. Winix lists it at $234.99, while the C545 offers similar CADR figures for less. Therefore, the AM90 is best for buyers who like its taller design or find it discounted.
Key specs
These values come from Winix’s official product listing. Specs the manufacturer does not publish are noted.
| Spec | Winix AM90 |
|---|---|
| CADR (smoke / dust / pollen) | 230 / 233 / 240 cfm |
| AHAM Verified room size | 373 sq ft |
| Air changes per hour | 4.8 in a 373 sq ft room (Winix figure) |
| Filtration | Washable fine mesh pre-filter, activated carbon filter, True HEPA filter, plus PlasmaWave |
| Fan speeds | 5 |
| Noise | From 27 dB on the lowest speed (top speed not published by the manufacturer) |
| Power draw | Not published by the manufacturer |
| Dimensions (W x D x H) | 14.9 x 7.8 x 23.6 in |
| Weight | Not published by the manufacturer |
| Smart features | Wi-Fi, Winix Smart app, Amazon Alexa |
| Modes | Auto mode with dual sensors, automatic sleep mode, 3-color air quality light |
| Certifications | AHAM Verified, CARB, UL |
| Replacement filter | Winix Filter A (115115): HEPA every 12 months, carbon every 3 months |
| Warranty | 2 years |
Strengths
Verified mid-size room coverage. An AHAM Verified room size of 373 square feet is slightly larger than the C545 and 5500-2 ratings. That makes it a good match for main bedrooms and smaller living rooms.
App and voice control. The Winix Smart app shows air quality and lets you change fan speed and modes remotely. In addition, it works with Amazon Alexa.
Easy-to-find filters. Filter A fits many Winix models, including the 5300-2, 6300-2, C909 and C535. As a result, it is widely stocked, and generic versions are common.
Smart automatic modes. Dual sensors adjust fan speed in auto mode. Meanwhile, sleep mode switches on by itself when the room goes dark.
Slim depth. At under 8 inches deep, it fits neatly beside a bed or against a wall.
Limitations
Price versus the C545. The C545 has slightly higher CADR ratings and usually costs less. Unless the AM90 is discounted, the C545 is often the better buy.
Frequent carbon filter changes. Winix recommends a new carbon filter every three months. That means four small swaps a year on top of the annual HEPA change.
Thin carbon layer. The carbon sheets handle everyday odors. However, they are not designed for heavy smoke or strong chemical smells.
PlasmaWave ionizer. The AM90 is CARB listed, so it meets California’s ozone limit. Still, some owners prefer to run without any ionizer. You can switch PlasmaWave off on the unit or in the app.
No timer, limited published data. Winix lists no timer function. It also does not publish weight, power draw or top-speed noise for this model.
Who it suits and who should skip it
The AM90 suits buyers who want app control and verified coverage for a mid-size room. It is a good fit for main bedrooms, home offices and smaller living areas. It also suits people who already own other Winix units that use Filter A.
You should skip it if price is your top concern, since the C545 gives similar results for less. Also skip it if you need strong odor control or coverage for a large open-plan space.
Winix AM90 review of filters, running cost and maintenance
The AM90 uses Winix Filter A, part number 115115. Each one-year set includes a True HEPA filter and a four-pack of activated carbon filters. Winix also sells Filter A with SmokeGuard, PetGuard or AllergenGuard treatments.
Winix lists Filter A at $84.99, and it often sells for around $55 on sale. Check current options on the official Winix AM90 product page.
Follow these steps to keep it running well:
- Vacuum or rinse the pre-filter every two weeks.
- Replace the carbon filter every three months.
- Replace the True HEPA filter every 12 months, or when the filter light comes on.
- Dust the sensor openings every few months.
How this Winix AM90 review was researched
We did not run hands-on tests for this Winix AM90 review. Instead, it draws on Winix’s official product listing, its AHAM Verified CADR ratings, its CARB listing, Winix filter pages and recurring themes in owner feedback. We compare those numbers with similar purifiers so you can judge the Winix AM90 fairly. Where the manufacturer does not publish a figure, we say so rather than guess.
Alternatives to consider
- Winix C545: similar CADR in a smaller body, usually for less money.
- Winix 5500-2: no app, but a washable carbon filter and low running costs.
- Coway Airmega AP-1512HH: a popular rival for similar room sizes.
- Levoit Core 400S: an app-connected round purifier with no ionizer.
See every model on our Winix brand page, or learn how we research and score our reviews.
Winix AM90 review: FAQ
What filter does the Winix AM90 use?
It uses Winix Filter A, part number 115115. Each set contains one True HEPA filter and four carbon filters, which covers about a year.
Is the Winix AM90 better than the C545?
Not on paper. The C545 has slightly higher CADR ratings and is usually cheaper. The AM90 has a slightly larger verified room size and uses the more common Filter A.
Does the Winix AM90 work with Alexa?
Yes. Winix lists Alexa support alongside its Winix Smart app, which handles fan speed, modes and air quality readings.
To close this Winix AM90 review: it is a reliable, app-connected purifier with verified performance for mid-size rooms. Buy it on sale or if you prefer its taller design; otherwise, the C545 is the better value.
