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Costco Members: Winix C545 True HEPA 4 Stage Air Purifier w/ Wi-Fi & Extra Filter Expired

$100
$129.99
+ $5 Shipping
+54 Deal Score
43,395 Views
Costco Wholesale has for its Members: Winix C545 True HEPA 4 Stage Air Purifier w/ Wi-Fi & Additional Filter on sale for $99.99. Shipping is $4.99.

Thanks to Community Member SmartAction274 for finding this deal.

Features:
  • True Hepa Filtration
  • PlasmaWave Technology
  • Aham Verified Room Size Of 360 Sq. Ft.
  • Air Quality Visual Indicator
  • Auto-mode Utilizes Smart Sensors

Original Post

Written by
Edited March 5, 2024 at 04:56 AM by
The best air purifier deal is back at Costco.

I have these Winix units all over my house.

Better performing than everything you can find on Amazon and it comes with 2 years of filtration and easy to control on a Wi-Fi app.

AHAM rated for 360 sq ft, but will cover up to nearly 1,800 square feet with one air change per hour.

My favorite feature is the sensors and auto mode. It gives you the ability to set it up and forget about it. The fan speeds will change automatically, the air quality sensor will change colors and let you know it's working and the change filter indicator will let you know when it's time to change the true HEPA filter (I usually set a timer/reminder for my carbon filter change as I do with my furnace filter).

These units have helped my air during wildfires, Covid periods and will be purchasing more as it's cheaper than buying some other units filters.

https://www.costco.com/winix-true...93012.html
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Deal
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$100
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Featured Comments

Anyone else have theirs develop a whine/hum? I had to move it to dog room
Winix includes an extra filter, so you're already at the same price, assuming $80 for Shark + $20 for extra filter.

Shark states 1000sqft of air change per hour, Winix is 1800sqft
Shark is refurb with 90day warranty, Winix is new with (I want to say) 2year warranty, plus Costco satisfaction coverage.

Can't comment on reliability of Shark, but I've got 3 Winix in the house. One of them being maybe 6-7 years old at this point. We use it almost daily.

On the Winix, I did have to open it up and tighten the fan when it started rattling at about 5 year mark. But I think even if someone had to replace it at that point, it would be totally worth it the price paid.
I bought 2 of these units for myself, and my father bought 1 last year. No complaints, have it setup on a schedule and on auto it is nearly silent even when it's only 4ft away from my head. It will ramp-up/down automatically if AQ decreases, and comes with 2-years of filters. Plus, Costco warranty.

If you're looking for one, highly recommended.

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Joined Jun 2007
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KenNashua
03-05-2024 at 08:11 AM.
03-05-2024 at 08:11 AM.
Did they not put the filters on sale? Very disappointed.
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TomatoFresco
03-05-2024 at 08:13 AM.
03-05-2024 at 08:13 AM.
Have 2, they are ok for the price. I really like how the screens keep dust out of the filters. Don't like the fan speeds, it really needs another speed setting in-between high and turbo. Not bad for the price.
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VioletCreator1160
03-05-2024 at 08:31 AM.
03-05-2024 at 08:31 AM.
Quote from xtreme571 :
Winix includes an extra filter, so you're already at the same price, assuming $80 for Shark + $20 for extra filter.

Shark states 1000sqft of air change per hour, Winix is 1800sqft
Shark is refurb with 90day warranty, Winix is new with (I want to say) 2year warranty, plus Costco satisfaction coverage.

Can't comment on reliability of Shark, but I've got 3 Winix in the house. One of them being maybe 6-7 years old at this point. We use it almost daily.

On the Winix, I did have to open it up and tighten the fan when it started rattling at about 5 year mark. But I think even if someone had to replace it at that point, it would be totally worth it the price paid.
Good catch, I was comparing the 360sqft to 1000sqft, but it's not apples to apples.
The Winix seems much better then, and supposedly the Shark auto sensors are useless
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dman081
03-05-2024 at 08:34 AM.

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03-05-2024 at 08:34 AM.
Note that the air sensor and auto mode on these is for VOCs, not particulates, which isn't what I think most people would assume.

Sensing VOCs is great for use near a diaper pale, if you rather frequently change your charcoal filter. (And the sensor is sensitive enough, I bet you could rig up a baby #2 alert triggered on the current draw when it kicks up to high.) But it's not for detecting dust, pm10, pm2.5, etc.

That's not a reason to not get this model — I have several and they're a good value. Just keep in mind what the sensor is triggering on. And perhaps have a standalone particulate sensor to test out what mode you need to run, for how long, to get the levels down to what you want for sleeping, for instance.

In our two smallish bedrooms with pretty well sealed windows, medium for 20 minutes and then low all night gets the already sub 10 pm2.5 to <3. (You can program the schedule in the app; you may need to switch your WiFi access points/router into 2.5ghz-only mode to get the purifiers to connect.)
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Last edited by dman081 March 5, 2024 at 08:38 AM.
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wazzuper1
03-05-2024 at 08:35 AM.
03-05-2024 at 08:35 AM.
I got this last year. Don't forget to check your electrical/gas company to see if there's a rebate to make this even sweeter! My company has a $25 rebate. Took about a month or so after I applied to get it.

My really old model was great for the first four years on auto or manually setting the speed to just below max. During the quarantining, I had it to always be set at 3 or 4 speed and then it developed a whine that I couldn't fix. That one has been moved to the hallway.
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YYS1029
03-05-2024 at 08:35 AM.
03-05-2024 at 08:35 AM.
I have 2 of these. Still going strong after 2 years
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cullenj76
03-05-2024 at 08:39 AM.
03-05-2024 at 08:39 AM.
Someone sell me on this over a coway 200m (1512/1518) for same price.

I already have two the 200m and love them but these pop up all the time so just curious.
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tackhouse1
03-05-2024 at 08:49 AM.
03-05-2024 at 08:49 AM.
Quote from Greenworld123 :
Anyone else have theirs develop a whine/hum? I had to move it to dog room
I had four C535 models. Two developed the whine. Doesn't seem to be something you can fix. I tried opening them up and putting oil on the motor, but it didn't help. Just bought to C545's to replace the noisy units. Glad to have the extended Costco Warranty.
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somighty
03-05-2024 at 09:23 AM.
03-05-2024 at 09:23 AM.
Quote from Greenworld123 :
Anyone else have theirs develop a whine/hum? I had to move it to dog room
Yes mine started making loud whistling noise. I heard Winix warranty is a hassle making you ship your unit to them. The noise doesn't really bother me so I'll still keep mine running.
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CoryP4000
03-05-2024 at 09:24 AM.
03-05-2024 at 09:24 AM.
Quote from Greenworld123 :
Anyone else have theirs develop a whine/hum? I had to move it to dog room

Have 3 and 2 developed whine. Had to move to room less occupied as well .. probably will move to another brand as a result . Lasted about 2 years.
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Eddy1292023
03-05-2024 at 09:34 AM.
03-05-2024 at 09:34 AM.
How is this compared to GermGuardian 6-in-1 Large Room Air Purifier with HEPA Filter deal at costco?

https://www.costco.com/GermGuardi...ue&nf=true
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Last edited by Eddy1292023 March 5, 2024 at 09:38 AM.
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SkillfulPiranha7944
03-05-2024 at 09:40 AM.

Our community has rated this post as helpful. If you agree, why not thank SkillfulPiranha7944

03-05-2024 at 09:40 AM.
This very informative NY Times article on air purifiers is considered a classic among consumer groups. It rates many models after years of testing. Unlike Consumer Reports, there is no paywall.

https://www.nytimes.com/wirecutte...-purifier/
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BeautifulVest1304
03-05-2024 at 09:45 AM.
03-05-2024 at 09:45 AM.
I have 6 of them, 3 of them scream at any speed beyond dead slow.
I had two others that I returned due to screaming whine. They replaced them with whiny little bitches.
No more Winix for me.
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SkillfulPiranha7944
03-05-2024 at 10:05 AM.
03-05-2024 at 10:05 AM.
This was one of my top choices when I was choosing air purifiers last year. I ultimately went with the Coway Airmega 200M, which is also frequently featured on SlickDeals. The main reason may affect your decision as well.

Basically, you cannot disable the light sensor in Auto mode. The light sensor automatically turns off the unit when the room is dark, presumably saving energy. Unfortunately, that means it won't automatically turn on at night or in a dimly lit area -- even if the air is heavily polluted by wildfires. The only way to remedy this is to go back into Manual mode. I've verified this with a rep who admitted that there have been complaints. This was a deal breaker because I like it on Auto while I sleep.

Other reasons I chose the Conway are: 1) It is the NY Times top overall pick. 2) It's efficiency and energy savings are incredibly high. On low, it uses about 4 watts and medium around 9 watts, I think. Yet the NY Times found that medium was good enough for most people. And it's incredibly quiet. High uses about 60 watts and sounds like a vacuum cleaner, but it has gone into High only 2 times, while i was dusting. 3) I found a brand new Open Box model on eBay for only $42! And shipping was free with free returns. That basically clinched the deal. YMMV. 4) I found cheap generic filters: $28 for 2 x HEPA and 8 x Carbon. Generic Winix filters are equally cheap.

Of note, the Conway is a very basic model but it does what I need perfectly. There is no app or Wi-Fi accessibility or fancy digital displays. The only "deluxe" features are an Auto mode and an optional Ionizer mode (which I love; the California board has certified it as Ozone-safe). If you need an app-controlled purifier then this Winix may be a better choice.

https://www.nytimes.com/wirecutte...-purifier/
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Last edited by SkillfulPiranha7944 March 5, 2024 at 06:30 PM.

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kmcherry
03-05-2024 at 10:16 AM.
03-05-2024 at 10:16 AM.
We have six, two refurbs from Woot, three from Costco, and one as a replacement for one of hte Costco ones from Winix. As others have said, they are likely to develop a whine; two of ours have done so. But both of these were newly purchased, not the refurbs from Woot.

We also have a Levoit, two Medify MA-25s, and two Airmegas 1512.

1) When they are on sale at Costco, and there is a $50 credit from the energy company, it's hard to beat this, especially with the additional filter. It's cheaper than just buying two filters, and we have one in storage for the eventful breakdown.
2) I like the scheduling feature. We struggled to hook a couple of them up to WiFi but I think that was a signal strength issue. One of ours sometiems struggles to connect, but we've never had the problems others have had.
3) I do NOT like the default PlasmaWave feature that turns on whenever the unit is turned off and on. I never use it, but sometimes if one of our kids accidentally turns it off and back on, the feature will be on for a while.
4) I think the air quality feature is not especially helpful, so leaving it on auto doesn't quite do the job.
5) For heavy duty cleaning, like when I accidentally burned chili powder (it made everyone cough), I think the Airmega is better.
6) However, on a day to day basis, the Winix running at high *not turbo* speed clears almost as much air as the Airmega at full power and is much quieter. That's how we use them most of the time. I've read in several places that you are better off with multiple purifiers at lower speeds than one very large purifier.

I was hoping the filters would go on sale, becasue I'm sick of buying new units and not sure I'm eligible for any more rebates, but this is a good deal.
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