Item 1 of 2
Item 1 of 2
populargmfitzg2 posted Jul 26, 2026 10:42 PM
Costco Wholesale
Deal Details
$20 OFF
$20 manufacturer's savings is valid 7/23/26 through 8/2/26. While supplies last.
Limit 5 per member.
Winix Genuine Replacement Filter S, 2-pack for C545 Air Purifier: https://www.costco.com/p/-/winix-...?langId=-1
Winix Replacement Filter Pack for C535 and C909 Air Purifiers, 2-pack also on sale: https://www.costco.com/p/-/winix-...?langId=-1
The Winix Replacement Filter S 2 Pack is a complete two year filter set. The Winix True HEPA captures up to 99.97% of airborne allergens including pollen, dust, smoke, pet dander, and other ultrafine particles as small as 0.3 microns. The 4-pack Carbon Filters traps large particles, extending the life of the True HEPA filter and absorbs odor in the environment.
The genuine Winix Filter S is compatible with Winix Air Purifier unit C545.
Accessories Included:
2 True Hepa Filters
8 Carbon Filters
Product Features:
True HEPA Filter: Captures up to 99.97%* of airborne allergens including pollen, dust, smoke, pet dander, and other ultrafine particles as small as 0.3 microns.
Activated Carbon Filters (4-pack): Reduces VOCs and household odors from cooking, pets, and smoke. It is designed to catch airborne particles found indoors, which also helps prolong the True HEPA Filter life.
Two True Hepa Filters and 8 Activated Carbon Filters included, up to a two year supply.
The genuine Winix Filter S is compatible with Winix Air Purifier unit C545.
Dimensions & More Info:
Package Dimensions of the 2 PK Box are: Depth: 6.5" x Length: 13 x Height: 14.5"
Package Weight of the 2 PK is 4 Lbs.
Made in Thailand
https://www.costco.com/p/-/winix-...?langId=-1
$20 manufacturer's savings is valid 7/23/26 through 8/2/26. While supplies last.
Limit 5 per member.
Winix Genuine Replacement Filter S, 2-pack for C545 Air Purifier: https://www.costco.com/p/-/winix-...?langId=-1
Winix Replacement Filter Pack for C535 and C909 Air Purifiers, 2-pack also on sale: https://www.costco.com/p/-/winix-...?langId=-1
The Winix Replacement Filter S 2 Pack is a complete two year filter set. The Winix True HEPA captures up to 99.97% of airborne allergens including pollen, dust, smoke, pet dander, and other ultrafine particles as small as 0.3 microns. The 4-pack Carbon Filters traps large particles, extending the life of the True HEPA filter and absorbs odor in the environment.
The genuine Winix Filter S is compatible with Winix Air Purifier unit C545.
Accessories Included:
2 True Hepa Filters
8 Carbon Filters
Product Features:
True HEPA Filter: Captures up to 99.97%* of airborne allergens including pollen, dust, smoke, pet dander, and other ultrafine particles as small as 0.3 microns.
Activated Carbon Filters (4-pack): Reduces VOCs and household odors from cooking, pets, and smoke. It is designed to catch airborne particles found indoors, which also helps prolong the True HEPA Filter life.
Two True Hepa Filters and 8 Activated Carbon Filters included, up to a two year supply.
The genuine Winix Filter S is compatible with Winix Air Purifier unit C545.
Dimensions & More Info:
Package Dimensions of the 2 PK Box are: Depth: 6.5" x Length: 13 x Height: 14.5"
Package Weight of the 2 PK is 4 Lbs.
Made in Thailand
https://www.costco.com/p/-/winix-...?langId=-1
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
$20 OFF
$20 manufacturer's savings is valid 7/23/26 through 8/2/26. While supplies last.
Limit 5 per member.
Winix Genuine Replacement Filter S, 2-pack for C545 Air Purifier: https://www.costco.com/p/-/winix-...?langId=-1
Winix Replacement Filter Pack for C535 and C909 Air Purifiers, 2-pack also on sale: https://www.costco.com/p/-/winix-...?langId=-1
The Winix Replacement Filter S 2 Pack is a complete two year filter set. The Winix True HEPA captures up to 99.97% of airborne allergens including pollen, dust, smoke, pet dander, and other ultrafine particles as small as 0.3 microns. The 4-pack Carbon Filters traps large particles, extending the life of the True HEPA filter and absorbs odor in the environment.
The genuine Winix Filter S is compatible with Winix Air Purifier unit C545.
Accessories Included:
2 True Hepa Filters
8 Carbon Filters
Product Features:
True HEPA Filter: Captures up to 99.97%* of airborne allergens including pollen, dust, smoke, pet dander, and other ultrafine particles as small as 0.3 microns.
Activated Carbon Filters (4-pack): Reduces VOCs and household odors from cooking, pets, and smoke. It is designed to catch airborne particles found indoors, which also helps prolong the True HEPA Filter life.
Two True Hepa Filters and 8 Activated Carbon Filters included, up to a two year supply.
The genuine Winix Filter S is compatible with Winix Air Purifier unit C545.
Dimensions & More Info:
Package Dimensions of the 2 PK Box are: Depth: 6.5" x Length: 13 x Height: 14.5"
Package Weight of the 2 PK is 4 Lbs.
Made in Thailand
https://www.costco.com/p/-/winix-...?langId=-1
$20 manufacturer's savings is valid 7/23/26 through 8/2/26. While supplies last.
Limit 5 per member.
Winix Genuine Replacement Filter S, 2-pack for C545 Air Purifier: https://www.costco.com/p/-/winix-...?langId=-1
Winix Replacement Filter Pack for C535 and C909 Air Purifiers, 2-pack also on sale: https://www.costco.com/p/-/winix-...?langId=-1
The Winix Replacement Filter S 2 Pack is a complete two year filter set. The Winix True HEPA captures up to 99.97% of airborne allergens including pollen, dust, smoke, pet dander, and other ultrafine particles as small as 0.3 microns. The 4-pack Carbon Filters traps large particles, extending the life of the True HEPA filter and absorbs odor in the environment.
The genuine Winix Filter S is compatible with Winix Air Purifier unit C545.
Accessories Included:
2 True Hepa Filters
8 Carbon Filters
Product Features:
True HEPA Filter: Captures up to 99.97%* of airborne allergens including pollen, dust, smoke, pet dander, and other ultrafine particles as small as 0.3 microns.
Activated Carbon Filters (4-pack): Reduces VOCs and household odors from cooking, pets, and smoke. It is designed to catch airborne particles found indoors, which also helps prolong the True HEPA Filter life.
Two True Hepa Filters and 8 Activated Carbon Filters included, up to a two year supply.
The genuine Winix Filter S is compatible with Winix Air Purifier unit C545.
Dimensions & More Info:
Package Dimensions of the 2 PK Box are: Depth: 6.5" x Length: 13 x Height: 14.5"
Package Weight of the 2 PK is 4 Lbs.
Made in Thailand
https://www.costco.com/p/-/winix-...?langId=-1
Community Voting
Deal Score
+10
Good Deal
Bad Deal
Found by VaIentino
Forum Thread
33% off
Found by neomatrixviper
Forum Thread
20% off
Found by Izzy138
Forum Thread
50% off
Found by phoinix
Forum Thread
26% off
Found by phoinix
Forum Thread
43% off
Found by gadgetNerd
Forum Thread
Found by Dr.W
Forum Thread
36% off
Found by d1bikes
Forum Thread
64% off
Found by babgaly
Forum Thread
50% off
Found by htp182
Forum Thread
41% off
Join The Conversation
Share your experience with the Slickdeals community
Share information with the community. Please follow our Community Guidelines and be kind!
7 Comments
Sign up for a Slickdeals account to remove this ad.
Our community has rated this post as helpful. If you agree, why not thank siricepick
If there is a PM meter in your house you can monitor it directly, or sensor in the unit set it to auto and forget it (I only recommend these and will only buy these)
Similarly, the DIY options with 120/140mm PC fans is the cheapest and most reliable. Probably pair it with a Ikea ALPSTUGA (now $35) and a tp-link p110m ($28/4-pack) to a matter thread to trigger it yourself.
But I've got two winix C545 (one bearing starting to get annoying I'm going to try and DIY repair) and two C610 (just bought another from costco as I saw it was 99.97 and had the star of death) and only bought generics for the C545 (replaced them when the app called for it since they are like $6/each)
Join The Conversation
Share your experience with the Slickdeals community
Share information with the community. Please follow our Community Guidelines and be kind!