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Costco Members: Winix C909 4-Stage Air Purifier
$160
$200
20% off
+ $5 S&Hat Costco Wholesale
+ $5 S&Hat Costco WholesaleDeal Details
Costco Wholesale has for its Members: Winix C909 4-Stage Air Purifier w/ WiFi & PlasmaWave Technology (1022-0228-00) on sale for $159.99. Shipping is $4.99.
Thanks to Community Member smyc305 for sharing this deal.
Features:
Thanks to Community Member smyc305 for sharing this deal.
Features:
- AHAM Verified up to 500 sq. ft. Room Coverage
- Energy Star & UL Certified
- Ultra-Quiet on Slowest Speed (25 db)
- Wi-Fi Enabled for Instant Monitoring and Control
- 2-Year Filter Supply: Includes 2 True HEPA replacement filters and 8 Activated Carbon Filters
Editor's Notes
Written by powerfuldoppler | Staff- This price matches our previous Frontpage Deal
- $40 manufacturer's savings is valid 9/1/26 through 9/30/26. While supplies last.
- Limit 5 per member.
- This product is rated 4.6 out of 5 stars based on 950 customer reviews.
- If you don't have a Costco Warehouse Membership, you can sign-up here
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale has for its Members: Winix C909 4-Stage Air Purifier w/ WiFi & PlasmaWave Technology (1022-0228-00) on sale for $159.99. Shipping is $4.99.
Thanks to Community Member smyc305 for sharing this deal.
Features:
Thanks to Community Member smyc305 for sharing this deal.
Features:
- AHAM Verified up to 500 sq. ft. Room Coverage
- Energy Star & UL Certified
- Ultra-Quiet on Slowest Speed (25 db)
- Wi-Fi Enabled for Instant Monitoring and Control
- 2-Year Filter Supply: Includes 2 True HEPA replacement filters and 8 Activated Carbon Filters
Editor's Notes
Written by powerfuldoppler | Staff- This price matches our previous Frontpage Deal
- $40 manufacturer's savings is valid 9/1/26 through 9/30/26. While supplies last.
- Limit 5 per member.
- This product is rated 4.6 out of 5 stars based on 950 customer reviews.
- If you don't have a Costco Warehouse Membership, you can sign-up here
Community Voting
Deal
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Community Reviews
The Winix C909 is a high airflow air purifier that works well for dust, pollen, and allergy relief, with reports of fewer allergies, less rash irritation, and pre filters that quickly collect visible debris. It uses the standard A filter with a carbon sheet, and the Costco bundle includes an extra filter plus Costco backing. The PlasmaWave ionizer defaults on, so it has to be turned off manually if desired, and WiFi control needs a 2.4 gigahertz network with no spaces in the network name. A bearing issue has also been raised on other Winix models, so long term reliability may be worth watching.
Common Questions (5)
Yes. It moves a lot more air than the other two models mentioned and works well for keeping dust and pollen down when there is enough space for it. It is also described as one of the best air purifiers at this price.
Yes. The PlasmaWave ionizer defaults to on, so it has to be turned off manually each time if you do not want it running. The ozone output is described as very low, so accidental use is not considered a major concern.
At $159.99, it is more expensive than a refurbished C909 bought for $120, but this Costco version includes an extra filter and Costco backing. The same price has also been paid at Costco before, which suggests it is a normal sale price for this model.
It uses the standard A filter with a carbon sheet, not the fancier carbon pellets. That makes it a simpler filter setup than some higher-end Winix models.
It can, but it requires a 2.4 GHz Wi‑Fi network and the SSID cannot contain spaces. Control is otherwise through the buttons on the unit or the Winix app.
AI-generated summary based on comments from the community. Updated ago
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37 Comments
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I live close to a relatively busy street, and I clean the house regularly, and still, these pre-filters need cleaning often. If you are sensitive to changes in the air, you should be able to feel and see that these purifiers work.
Here's the mandatory link to the ProjectFarm YouTube channel testing air purifiers: https://youtu.be/sQGfO4hNb60?is=
Edit: Worked on formatting.
That said, the ozone generated by the Plasmawave is supposed to be really low so if I forgot to turn it off I don't see why there would be a concern.....
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