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rubiks 19.9K Views
Apr 3, 2026 6:34 AM

Costco Members: 2-Pk Winix Replacement Air Filters (C545 / C535 / C909)

$60

$80

25% off
+ Free Shippingat Costco Wholesale
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Deal Details
Costco Wholesale has for Costco Members: 2-Pack Winix Replacement Air Purifier Filters (various) on sale listed below for $59.99. Shipping is free.

Thanks to Community Members rubiks & c0ld8 for finding this deal.

Available: Features:
  • True-HEPA Filtration
  • Captures up to 99.97% of Particles as Small as 0.3 Microns
  • Activated Carbon Filters: Reduces VOCs and Odors from Cooking, Pets, and Smoke

Editor's Notes

Written by johnny_miller | Staff
  • About this Product:
    • Rated 4.7 - 4.8 out of 5 stars.
  • About this Store:
    • If you don't have a Costco Warehouse Membership, you can sign-up here
  • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by rubiks
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale has for Costco Members: 2-Pack Winix Replacement Air Purifier Filters (various) on sale listed below for $59.99. Shipping is free.

Thanks to Community Members rubiks & c0ld8 for finding this deal.

Available: Features:
  • True-HEPA Filtration
  • Captures up to 99.97% of Particles as Small as 0.3 Microns
  • Activated Carbon Filters: Reduces VOCs and Odors from Cooking, Pets, and Smoke

Editor's Notes

Written by johnny_miller | Staff
  • About this Product:
    • Rated 4.7 - 4.8 out of 5 stars.
  • About this Store:
    • If you don't have a Costco Warehouse Membership, you can sign-up here
  • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by rubiks

Community Voting

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Top Comments

DarnCrazy
2.5KComments
895Reputation
LifeSupplyUSA on eBay has been pretty solid when it comes to aftermarket filters. I've tried a few others but they were mostly no-name brands and they're no longer being sold. I also buy official Winix filters when they're on sale for cheaper than usual with credit card point deals. Ironically, I found the LifeSupplyUSA filters to actually be thicker and slighter better made and the official OEM filters.
Go to Comment
configer
754Comments
62Reputation
is it really better than generic brands also claiming HEPA?
Go to Comment
enigmatticus
20Comments
10Reputation
That means the bearings in the fan motor are going bad
Go to Comment

Community Reviews

This Winix OEM replacement filter is valued mainly for matching the C545 and preserving the purifier's original fit and performance. The community also points to OEM filters lasting about a year, with some aftermarket options costing less but varying a lot in thickness, seal quality, and lifespan. The main caveat is price, since comparable generic packs and even refurbed units can be cheaper, and fitment has been questioned against Costco listings. A solid choice when exact compatibility matters more than saving a few dollars.

Common Questions (6)

AI-generated summary based on comments from the community. Updated ago

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46 Comments

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Apr 3, 2026 4:21 PM
754 Comments
Joined Sep 2015
configerApr 3, 2026 4:21 PM
754 Comments
is it really better than generic brands also claiming HEPA?
Apr 3, 2026 9:18 PM
1.2K Comments
Joined Sep 2014
m3n00bApr 3, 2026 9:18 PM
1.2K Comments
Quote from configer View quoted comment :
is it really better than generic brands also claiming HEPA?
I don't think so
1
8
Apr 3, 2026 9:20 PM
2K Comments
Joined Sep 2005

This comment has been rated as unhelpful by Slickdeals users.

Apr 3, 2026 9:25 PM
2.5K Comments
Joined Feb 2005
DarnCrazyApr 3, 2026 9:25 PM
2.5K Comments
Quote from configer View quoted comment :
is it really better than generic brands also claiming HEPA?
It really depends on the generic ones you get. I've had some good success with some filters but also have had some there were clearly inferior with thinner material. So if you find a decent generic, you can definitely get similar OEM like filters.
Apr 3, 2026 9:26 PM
1.2K Comments
Joined Feb 2024

This comment has been rated as unhelpful by Slickdeals users.

Apr 3, 2026 10:17 PM
136 Comments
Joined Nov 2016
ganievich278Apr 3, 2026 10:17 PM
136 Comments
Quote from DarnCrazy View quoted comment :
It really depends on the generic ones you get. I've had some good success with some filters but also have had some there were clearly inferior with thinner material. So if you find a decent generic, you can definitely get similar OEM like filters.
Any chance you can share your personal opinion on which ones you thought were good and which are not?
Apr 3, 2026 10:26 PM
1.2K Comments
Joined Feb 2024
AronManApr 3, 2026 10:26 PM
1.2K Comments
as one can get a refurbed c545 for $59 shipped that comes with one hepa filter and four carbon prefilters, I question those that think this is a good deal...
2

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Apr 3, 2026 10:29 PM
1.2K Comments
Joined Feb 2024
AronManApr 3, 2026 10:29 PM
1.2K Comments
https://www.amazon.com/C545-Repla...213&sr=8-6
3
Apr 3, 2026 10:42 PM
2.5K Comments
Joined Feb 2005
DarnCrazyApr 3, 2026 10:42 PM
2.5K Comments

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

Quote from ganievich278 View quoted comment :
Any chance you can share your personal opinion on which ones you thought were good and which are not?
LifeSupplyUSA on eBay has been pretty solid when it comes to aftermarket filters. I've tried a few others but they were mostly no-name brands and they're no longer being sold. I also buy official Winix filters when they're on sale for cheaper than usual with credit card point deals. Ironically, I found the LifeSupplyUSA filters to actually be thicker and slighter better made and the official OEM filters.
2
1
Apr 3, 2026 11:01 PM
322 Comments
Joined May 2009
SubieR6Apr 3, 2026 11:01 PM
322 Comments
Anyone else have theirs making high pitched sounds when it runs on high?
1
Apr 4, 2026 12:09 AM
287 Comments
Joined Dec 2020
avalanchedogApr 4, 2026 12:09 AM
287 Comments
This is a great deal. Although I just bought some generics for from Fette Filters for ~$40. Will see how they hold up.
1
Apr 4, 2026 12:16 AM
47 Comments
Joined Oct 2014
bigmik1021Apr 4, 2026 12:16 AM
47 Comments
Quote from GhostGrayBolt View quoted comment :
as one can get a refurbed c545 for $59 shipped that comes with one hepa filter and four carbon prefilters, I question those that think this is a good deal...
You get two filters for 60
1
Apr 4, 2026 1:48 AM
20 Comments
Joined Jan 2018
enigmatticusApr 4, 2026 1:48 AM
20 Comments

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

Quote from SubieR6 View quoted comment :
Anyone else have theirs making high pitched sounds when it runs on high?
That means the bearings in the fan motor are going bad
2
Apr 4, 2026 3:58 AM
61 Comments
Joined Jul 2007
BoycottBuyApr 4, 2026 3:58 AM
61 Comments
Costco shows this fits the C535 and C909. Does it really fit the C545 too?

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Apr 4, 2026 4:05 AM
478 Comments
Joined Feb 2010
lostlinkApr 4, 2026 4:05 AM
478 Comments
Quote from BoycottBuy View quoted comment :
Costco shows this fits the C535 and C909. Does it really fit the C545 too?

No but both sizes are usually on sale at the same time.......

https://www.costco.com/p/-/winix-...?langId=-1
1

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Home & Home ImprovementSmall AppliancesAir Purifiers, Humidifiers & DehumidifiersWinixCostco Wholesale