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expiredBrotein posted Nov 01, 2025 10:10 AM
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expiredBrotein posted Nov 01, 2025 10:10 AM

Costco Members: Winix C909 4-Stage Air Purifier $160

$160

$200

20% off
Costco Wholesale
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Deal 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.

Accessories Included:
Two Genuine Winix True HEPA Filter sets included for up to 24 months normal usage
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

https://www.costco.com/p/-/winix-.../100842491
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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.

Accessories Included:
Two Genuine Winix True HEPA Filter sets included for up to 24 months normal usage
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

https://www.costco.com/p/-/winix-.../100842491

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19 Comments

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Nov 01, 2025 02:12 PM
1,607 Posts
Joined Aug 2011
a_landNov 01, 2025 02:12 PM
1,607 Posts
The 610 for 99 is probably the better deal right? I have one and love it
2
Nov 02, 2025 12:07 AM
2,176 Posts
Joined Nov 2017
twiggy_alien_manNov 02, 2025 12:07 AM
2,176 Posts
Quote from a_land :
The 610 for 99 is probably the better deal right? I have one and love it
No, not even close.
1
Nov 02, 2025 02:06 AM
1,421 Posts
Joined Oct 2005
SDELNICKNov 02, 2025 02:06 AM
1,421 Posts
Quote from twiggy_alien_man :
No, not even close.
Why is that? If you have a small room c610 might be a good choice.
Nov 02, 2025 03:28 AM
68 Posts
Joined Dec 2014
MarySaNov 02, 2025 03:28 AM
68 Posts
I got two of these as refurbs for work. One thing I like is that at 75% of the highest setting, level three, the noise is very reasonable and as long as the unit is not right next to me, I don't notice it much.
If you compare the various models from winix, this is on the higher end for capacity. That means that if you have a room that's significantly smaller than what this unit is rated for, you can use it on a lower setting and get the same cleaning as a smaller unit on a higher setting.
Nov 02, 2025 03:39 AM
68 Posts
Joined Dec 2014
MarySaNov 02, 2025 03:39 AM
68 Posts

Our community has rated this post as helpful. If you agree, why not thank MarySa

Quote from SDELNICK :
Why is that? If you have a small room c610 might be a good choice.
The c610 is probably a fine choice, but the c909 is rated for a 30% larger room (500 ft² versus 384 ft²). This difference counts for a lot when considering how much cleaning the unit can do at which setting. C909 is a bit of a chunky unit so may not be a good choice for a small room, but if you ever need to use it in a larger space, the larger capacity will do a lot of good. In a small room, the c909 can clean the air on a lower setting, therefore quieter, then the c610 could. If you don't spend time in the room in question, that might not be a big deal, but noise level is everything if you have to hear it.
1
Nov 02, 2025 03:41 PM
13 Posts
Joined Aug 2022
MerryPickle9398Nov 02, 2025 03:41 PM
13 Posts
is this deal in person or online only?
Nov 02, 2025 07:14 PM
172 Posts
Joined May 2006
EverlongNov 02, 2025 07:14 PM
172 Posts
If this didn't have forced plasmawave on every time you start it I'd be interested

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Pro
Nov 03, 2025 04:16 AM
12,643 Posts
Joined Jul 2010
supermanrob
Pro
Nov 03, 2025 04:16 AM
12,643 Posts
Quote from Everlong :
If this didn't have forced plasmawave on every time you start it I'd be interested
FYI you can turn it off on the app.
1
Nov 03, 2025 04:40 AM
69 Posts
Joined Aug 2006
VikatanNov 03, 2025 04:40 AM
69 Posts
Does anyone know the in-store price of the same item?
Pro
Nov 03, 2025 11:48 AM
12,643 Posts
Joined Jul 2010
supermanrob
Pro
Nov 03, 2025 11:48 AM
12,643 Posts
Quote from Vikatan :
Does anyone know the in-store price of the same item?
I don't think they sell this in store, strictly on line only. I've never seen it in store here locally.
1
Nov 03, 2025 09:25 PM
83 Posts
Joined Nov 2016
artvandelay0Nov 03, 2025 09:25 PM
83 Posts
Quote from SDELNICK :
Why is that? If you have a small room c610 might be a good choice.
I have a c909 and two c610s. The c909 is much more powerful. I would only suggest c610 for a small bedroom.
Nov 04, 2025 04:46 AM
1,414 Posts
Joined Sep 2009
bargainfinder09Nov 04, 2025 04:46 AM
1,414 Posts
I wanna return and re-buy a 45 day unit as price adjustment isn't possible anymore.. Does anyone know if Costco records serial # on these. It is easier to just return the new item with the older receipt.
Last edited by bargainfinder09 November 4, 2025 at 02:10 AM.
3
Nov 04, 2025 04:52 AM
1,414 Posts
Joined Sep 2009
bargainfinder09Nov 04, 2025 04:52 AM
1,414 Posts
Winix C909
Room Size: 500 ft.2
Tobacco Smoke CADR: 323 CFM
Dust CADR: 336 CFM
PM2.5 CADR: 330 CFM
Pollen CADR: 384 CFM
Power: 95 W

Winix C610
Room Size: 384 ft.2
Tobacco Smoke CADR: 248 CFM
Dust CADR: 252 CFM
PM2.5 CADR: 250 CFM
Pollen CADR: 262 CFM
Power: 45 W
Last edited by bargainfinder09 November 3, 2025 at 08:55 PM.
1
Nov 07, 2025 02:48 AM
2,345 Posts
Joined Feb 2005
DarnCrazyNov 07, 2025 02:48 AM
2,345 Posts
Quote from MarySa :
The c610 is probably a fine choice, but the c909 is rated for a 30% larger room (500 ft² versus 384 ft²). This difference counts for a lot when considering how much cleaning the unit can do at which setting. C909 is a bit of a chunky unit so may not be a good choice for a small room, but if you ever need to use it in a larger space, the larger capacity will do a lot of good. In a small room, the c909 can clean the air on a lower setting, therefore quieter, then the c610 could. If you don't spend time in the room in question, that might not be a big deal, but noise level is everything if you have to hear it.
Completely agree with your assessment.

I returned the C610 for the C909 for several reasons:
  • The C909 takes a standard Filter A - 115115 which you can get cheap after market filters for, or even cheap deals on the OEM ones (low as $25).
  • The C909 is quieter than the C610 for the amount of air it moves.
  • The C610 only works well on the turbo speed but is very loud. The high speed on C610 is a joke and doesn't move much air at all compared to the C909.
I'm planning to pick up another of these for a larger room to see how well it does, but for a bedroom, it works well at reducing pollen. Just know that the smart app is kinda crappy for iOS and Android and you must connect to a 2.4GHz wireless network for it to work.
Last edited by DarnCrazy November 8, 2025 at 05:12 PM.

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Nov 09, 2025 02:01 PM
30 Posts
Joined Dec 2021
mahvelNov 09, 2025 02:01 PM
30 Posts
Bought this last black friday and it's been incredible how big of a difference the air quality has been. The Winix app works great too.

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