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expired Posted by totsata • Jul 4, 2024
expired Posted by totsata • Jul 4, 2024

Costco Members: 2-Pack Winix Replacement Air Filters: C535 $65, C545

+ Free Shipping

$60

$80

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

Thanks to Community Member totsata 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 RazorConcepts | Staff
  • About this Offer:
    • This is $20 lower (25% savings) than the regular price.
  • About this Product:
    • This is rated 4.8 out of 5 stars based on over 200 ratings.
  • 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 totsata
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 as listed below. Shipping is free.

Thanks to Community Member totsata 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 RazorConcepts | Staff
  • About this Offer:
    • This is $20 lower (25% savings) than the regular price.
  • About this Product:
    • This is rated 4.8 out of 5 stars based on over 200 ratings.
  • 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 totsata

Community Voting

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+56
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Top Comments

You can save a lot more than that with aftermarket filters.

This thread is guaranteed to be overrun by the "I only trust authentic filters" crowd who will thumb this down, but the truth is that the composition of HEPA filters isn't some trade secret.

Given equal composition and dimensions, the only characteristic that could possibly differ is the number of pleats one filter has over the other. More pleats offers more surface area and more filtering material, which creates a measurable difference in filtration.

There's some downsides to this, but for the sake of simplicity, that's pretty much all you need to look for when choosing a filter that will perform on par with the official ones.

The C545 (S) filters I get off Amazon come out to about $8 each and I swap them out every 4 months.

As for the carbon filters, those are primarily meant to absorb odor. They do help with pet hair, but you definitely do not need to change them as frequently as they're trying to sell them to you. Just vacuum them out, wash them, and toss them back in once dry.
You can fix the motor whine by lubricating them.

The YouTube disassembly video is only 15min long, so it's pretty trivial. A smart move is to print screenshots from the video and match up where each screw goes.

For lube, Super Lube worked great.
I'd rather save the ~$10 bucks, after all, that is whole purpose of this site.

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Jul 5, 2024
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ScottoDono
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I miss when you could get one for $30
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LivelyPicture596
Jul 5, 2024
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Thanks was waiting for a sale on these and didn't want to buy knockoffs online. Grab three.
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timbertop
Jul 5, 2024
3,380 Posts
A single authentic Winix Filter A set number 115115 for the older unit C535 is $36.70 shipped and sold by Amazon or $73.40 for two sets compared to $65 for the pair of sets at Costco. Free delivery for me tomorrow vs a week from Costco.
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Quote from timbertop :
A single authentic Winix Filter A set number 115115 for the older unit C535 is $36.70 shipped and sold by Amazon or $73.40 for two sets compared to $65 for the pair of sets at Costco. Free delivery for me tomorrow vs a week from Costco.
I'd rather save the ~$10 bucks, after all, that is whole purpose of this site.
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travelkin
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How long do they last?
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wherestheanykey
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Our community has rated this post as helpful. If you agree, why not thank wherestheanykey

Quote from DeProof :
I'd rather save the ~$10 bucks, after all, that is whole purpose of this site.
You can save a lot more than that with aftermarket filters.

This thread is guaranteed to be overrun by the "I only trust authentic filters" crowd who will thumb this down, but the truth is that the composition of HEPA filters isn't some trade secret.

Given equal composition and dimensions, the only characteristic that could possibly differ is the number of pleats one filter has over the other. More pleats offers more surface area and more filtering material, which creates a measurable difference in filtration.

There's some downsides to this, but for the sake of simplicity, that's pretty much all you need to look for when choosing a filter that will perform on par with the official ones.

The C545 (S) filters I get off Amazon come out to about $8 each and I swap them out every 4 months.

As for the carbon filters, those are primarily meant to absorb odor. They do help with pet hair, but you definitely do not need to change them as frequently as they're trying to sell them to you. Just vacuum them out, wash them, and toss them back in once dry.
Last edited by wherestheanykey July 5, 2024 at 04:42 AM.
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Meatsweats21
Jul 5, 2024
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You can get generic filters a lot cheaper. I also have 5 of these machines from Costco that I've bought over the past 4 years and all of them develop motor whine. I'd stay away unless they've fixed the issue with new ones.
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Quote from timbertop :
A single authentic Winix Filter A set number 115115 for the older unit C535 is $36.70 shipped and sold by Amazon or $73.40 for two sets compared to $65 for the pair of sets at Costco. Free delivery for me tomorrow vs a week from Costco.
So you're justifying $8+ for expedited shipping?

That's fair, but if you don't *need* to replace them within a week, then it appears that your decision is driven by the need for instant gratification.

Nothing wrong with that as it's your choice, but your argument breaks down for the target audience. $13% premium for expedited shipping is a bit much.
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Quote from Meatsweats21 :
You can get generic filters a lot cheaper. I also have 5 of these machines from Costco that I've bought over the past 4 years and all of them develop motor whine. I'd stay away unless they've fixed the issue with new ones.
You can fix the motor whine by lubricating them.

The YouTube disassembly video is only 15min long, so it's pretty trivial. A smart move is to print screenshots from the video and match up where each screw goes.

For lube, Super Lube worked great.
Jul 5, 2024
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ironman69
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Quote from wherestheanykey :
You can save a lot more than that with aftermarket filters.

This thread is guaranteed to be overrun by the "I only trust authentic filters" crowd who will thumb this down, but the truth is that the composition of HEPA filters isn't some trade secret.

Given equal composition and dimensions, the only characteristic that could possibly differ is the number of pleats one filter has over the other. More pleats offers more surface area and more filtering material, which creates a measurable difference in filtration.

There's some downsides to this, but for the sake of simplicity, that's pretty much all you need to look for when choosing a filter that will perform on par with the official ones.

The C545 (S) filters I get off Amazon come out to about $8 each and I swap them out every 4 months.

As for the carbon filters, those are primarily meant to absorb odor. They do help with pet hair, but you definitely do not need to change them as frequently as they're trying to sell them to you. Just vacuum them out, wash them, and toss them back in once dry.
Which ones do you order?
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wherestheanykey
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Quote from ironman69 :
Which ones do you order?
Search for the purifier brand and the original part number or the filter type.

The 545 uses S filters.

Count the pleats on the original filter and compare to the one pictured. Obviously, check the reviews.

SD removes Amazon links that fall under whatever criteria they have set, as well as other shady stuff, so I can't post one directly.
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Quote from ironman69 :
Which ones do you order?
Second..
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Glayde
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Quote from wherestheanykey :
You can save a lot more than that with aftermarket filters.

This thread is guaranteed to be overrun by the "I only trust authentic filters" crowd who will thumb this down, but the truth is that the composition of HEPA filters isn't some trade secret.

Given equal composition and dimensions, the only characteristic that could possibly differ is the number of pleats one filter has over the other. More pleats offers more surface area and more filtering material, which creates a measurable difference in filtration.

There's some downsides to this, but for the sake of simplicity, that's pretty much all you need to look for when choosing a filter that will perform on par with the official ones.

The C545 (S) filters I get off Amazon come out to about $8 each and I swap them out every 4 months.

As for the carbon filters, those are primarily meant to absorb odor. They do help with pet hair, but you definitely do not need to change them as frequently as they're trying to sell them to you. Just vacuum them out, wash them, and toss them back in once dry.
I did try knockoff filters from amazon and they had such an awful musty sour smell.

Can you link the ones you use?
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linksyss
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The replacement filters number for my C535 has always been 115115, but this link shows 113151. I don't know what the difference is or if it matters. It could be slightly different to also accommodate the C909.

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Quote from Glayde :
I did try knockoff filters from amazon and they had such an awful musty sour smell.

Can you link the ones you use?
That might be the plastic they were wrapped in, or possibly a lack thereof if you ordered during a humid season?

The ones I've used all come individually wrapped.

When it's time for a change, I put the purifier on turbo for at least an hour to make sure it's working properly.

Another possibility is that you're smelling the ionizer, perhaps?

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