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

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.

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.

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.

Anyone else have theirs develop a whine/hum? I had to move it to dog room

For $20 less, how does it compare to this? (same 2-year total cost, assume a filter lasts a year and a shark replacement filter costs $20)

https://home.woot.com/offers/shar...nt_wp_0_11

Anyone else have theirs develop a whine/hum? I had to move it to dog room

I bought 2 today. Its store available!!