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expired Posted by SplendidLaborer9506 • May 30, 2022
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expired Posted by SplendidLaborer9506 • May 30, 2022

Costco Members: Winix C909 4-Stage Air Purifier

+ $5 S/H

$160

$200

20% off
Costco Wholesale
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Deal Details
Costco Wholesale has for their Members: Winix C909 4-Stage Air Purifier w/ WiFi & PlasmaWave Technology (1022-0228-00) for $159.99. Shipping is $4.99.

Thanks to Community Member SplendidLaborer9506 for finding this deal.

Accessories Included:
  • Two Genuine Winix True HEPA Filter sets included for up to 24 months normal usage
Features:
  • AHAM Verified up to 500 sq. ft. Room Coverage
  • Energy Star & UL Certified
  • Ultra-Quiet on Slowest Speed (25 db)
  • Wi-Fi Enabled for Instant Monitoring and Control

Editor's Notes

Written by powerfuldoppler | Staff
  • About this deal:
    • This price is $40 lower (20% savings) than the list price of $199.99.
  • About this product:
    • 2-Year Manufacturers' Warranty
  • About this store:
    • Details of Costco's return policy here.
  • Please read the Forum Thread for more deal discussion.

Original Post

Written by SplendidLaborer9506
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale has for their Members: Winix C909 4-Stage Air Purifier w/ WiFi & PlasmaWave Technology (1022-0228-00) for $159.99. Shipping is $4.99.

Thanks to Community Member SplendidLaborer9506 for finding this deal.

Accessories Included:
  • Two Genuine Winix True HEPA Filter sets included for up to 24 months normal usage
Features:
  • AHAM Verified up to 500 sq. ft. Room Coverage
  • Energy Star & UL Certified
  • Ultra-Quiet on Slowest Speed (25 db)
  • Wi-Fi Enabled for Instant Monitoring and Control

Editor's Notes

Written by powerfuldoppler | Staff
  • About this deal:
    • This price is $40 lower (20% savings) than the list price of $199.99.
  • About this product:
    • 2-Year Manufacturers' Warranty
  • About this store:
    • Details of Costco's return policy here.
  • Please read the Forum Thread for more deal discussion.

Original Post

Written by SplendidLaborer9506

Community Voting

Deal Score
+25
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Top Comments

Ohsighrus
1950 Posts
2172 Reputation
Worth noting that the 5500-2 outperforms the C909 even though the C909 has a higher square foot recommendation. The C909 uses almost twice the yearly wattage: of the 5500-2 at 527 kWh/year where the 5500-2 uses 296 kWh/year. Don't get hung up on the room size as it's a gimmick. What matters is efficiency as air isn't limited to a single room as it's ambient and is always constantly moving. You will get far better air exchanges per watt out of the 5500-2 and far better TVOC removal with the pellet filters over crappy infused mesh gimmicks found on most cheaper and less effective models of purifiers. Also most people disable the "plasma wave" gimmicks as they aren't effective or proven to do anything. The HEPA filters and activated carbon is what gives you clean air. The gimmick of adding ions to molecules just means you're going to find a whole lot more dust and particles on your floor rather than in the air, which get stirred up eventually again anyway.

5500-2 used to cost this price on Amazon without a Costco membership, so this "deal" is meh. 5300-2 is also cheaper than this in many locations that don't require a $60 yearly membership. The 5500-2 > 5300-2 as the 5300-2 uses the same carbon filter as the C909 where the 5500-2 uses the pellet washable filters which are far higher quality and effectiveness.

5500-2:
Annual Energy Use (kWh/year): 296.5831304
Room Size (sq.ft.): 360
Smoke-Free Clean Air Delivery Rate per Watt: 4.6
Dust-Free Clean Air Delivery Rate per Watt: 4.86
Pollen-Free Clean Air Delivery Rate per Watt: 4.900398406
Smoke-Free Clean Air Delivery Rate (cfm): 232.0
Dust-Free Clean Air Delivery Rate (cfm): 243.0
Pollen-Free Clean Air Delivery Rate (cfm): 246.0

C909
Annual Energy Use (kWh/year): 527.0729778
Room Size (sq.ft.): 501
Smoke-Free Clean Air Delivery Rate per Watt: 3.6
Dust-Free Clean Air Delivery Rate per Watt: 3.79
Pollen-Free Clean Air Delivery Rate per Watt: 4.261931188
Smoke-Free Clean Air Delivery Rate (cfm): 323.0
Dust-Free Clean Air Delivery Rate (cfm): 336.0
Pollen-Free Clean Air Delivery Rate (cfm): 384.0

The 5500-2 uses pellet sized activated carbon with far more surface area for adsorption where the C909 uses crappy and far less effective mesh filters with carbon "infused" in it. The 5500-2 carbon filters are made to last and are washable to reactivate the carbon where the crappy mesh ones last a few weeks at best in most tests and need to be thrown away which is why they give you far more. The pellets will last closer the 6 months. The 5500-2 filters are far easier to find in stock and the C909 uses it's own proprietary filters which are much harder to find.

5500-2 has gone for cheaper than this price too on front page deals in the past.

Personally I would pass on this "deal" and wait for the 5500-2 to go back on sale OR look into the much cheaper and more effective home made Corsi-Rosenthal box as diagramed here: https://cleanaircrew.org/box-fan-filters/ and the effectiveness has been outlined well here: https://mobile.twitter.com/marwa_...5404206090 It outperforms even the large and far more expensive $500+ filters on the market. The 3M Merv 13 (1900) filters have far less static pressure than most merv 13 filters making them the best option for fan filters. This was proven plenty of times by Project Farm testing and can be outlined in this video here: https://www.youtube.com/watch?v=RkjRKIRva58
ChristineF4
81 Posts
14 Reputation
I have black and white ones, white stands out more tbh
Ohsighrus
1950 Posts
2172 Reputation
HVAC filters typically run a Merv 6 or 8 filter which is no where near as effective as a HEPA filter. HEPA filters are closer to Merv 13/14 filters used in hospitals. These filters have too high of static pressure to be used in your homes HVAC system and will blow out the motor pretty quickly. Speak to any HVAC tech and they will tell you how bad your home HVAC is compared to a HEPA or Merv 13 filter. (https://www.youtube.com/watch?v=RkjRKIRva58)

Merv 6 filters remove less than 50% of particles sized 3.0 to 10.0. Merv 8 remove 84% of microns sized 3.0 to 10.0. Merv 13 remove 75% of particles sized 0.3 to 1.0 and 90% of particles sized 1.0-3.0.

HEPA type of air filter can theoretically remove at least 99.97% of dust, pollen, mold, bacteria, and any airborne particles with a size of 0.3 microns (µm). The diameter specification of 0.3 microns responds to the worst case; the most penetrating particle size (MPPS). Particles that are larger or smaller are trapped with even higher efficiency. Using the worst case particle size results in the worst case efficiency rating (i.e. 99.97% or better for all particle sizes).

TL;dr Merv 8 remove as small as 3.0 microns where merv 13 remove as small as 0.3 microns. It's an astronomical difference. Your home HVAC system sucks at removing particles and is only there to prevent the largest of particles causing damage to your ducting.

NOTE: cheap filters especially on Amazon are a huge no no. Use 3M grade filters or you may as well not have a filter at all. These off brand and Chinese non-genuine filters always suck. They don't do anything near what they advertise. They are not independently tested well and will NEVER out perform filters that cost more. Again please see Project Farm's test: https://www.youtube.com/watch?v=RkjRKIRva58

50 Comments

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May 31, 2022
1,046 Posts
Joined Nov 2011
May 31, 2022
SoupMonster
May 31, 2022
1,046 Posts
Quote from popomama :
Anyone knows what the Costco return policy is for the air purifier? Is it 90-day?
Unlimited - no specific time
1
May 31, 2022
708 Posts
Joined Dec 2013
May 31, 2022
DwayneD2708
May 31, 2022
708 Posts
Has anyone noticed a difference in air quality with these? They started booming around covid, so I was just wondering if it's a gimmick or not. Isn't the HVAC filter enough?

Do I need one in each room or just the main rooms I'm in?
1
May 31, 2022
1,950 Posts
Joined Jun 2018
May 31, 2022
Ohsighrus
May 31, 2022
1,950 Posts

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

Worth noting that the 5500-2 outperforms the C909 even though the C909 has a higher square foot recommendation. The C909 uses almost twice the yearly wattage: of the 5500-2 at 527 kWh/year where the 5500-2 uses 296 kWh/year. Don't get hung up on the room size as it's a gimmick. What matters is efficiency as air isn't limited to a single room as it's ambient and is always constantly moving. You will get far better air exchanges per watt out of the 5500-2 and far better TVOC removal with the pellet filters over crappy infused mesh gimmicks found on most cheaper and less effective models of purifiers. Also most people disable the "plasma wave" gimmicks as they aren't effective or proven to do anything. The HEPA filters and activated carbon is what gives you clean air. The gimmick of adding ions to molecules just means you're going to find a whole lot more dust and particles on your floor rather than in the air, which get stirred up eventually again anyway.

5500-2 used to cost this price on Amazon without a Costco membership, so this "deal" is meh. 5300-2 is also cheaper than this in many locations that don't require a $60 yearly membership. The 5500-2 > 5300-2 as the 5300-2 uses the same carbon filter as the C909 where the 5500-2 uses the pellet washable filters which are far higher quality and effectiveness.

5500-2:
Annual Energy Use (kWh/year): 296.5831304
Room Size (sq.ft.): 360
Smoke-Free Clean Air Delivery Rate per Watt: 4.6
Dust-Free Clean Air Delivery Rate per Watt: 4.86
Pollen-Free Clean Air Delivery Rate per Watt: 4.900398406
Smoke-Free Clean Air Delivery Rate (cfm): 232.0
Dust-Free Clean Air Delivery Rate (cfm): 243.0
Pollen-Free Clean Air Delivery Rate (cfm): 246.0

C909
Annual Energy Use (kWh/year): 527.0729778
Room Size (sq.ft.): 501
Smoke-Free Clean Air Delivery Rate per Watt: 3.6
Dust-Free Clean Air Delivery Rate per Watt: 3.79
Pollen-Free Clean Air Delivery Rate per Watt: 4.261931188
Smoke-Free Clean Air Delivery Rate (cfm): 323.0
Dust-Free Clean Air Delivery Rate (cfm): 336.0
Pollen-Free Clean Air Delivery Rate (cfm): 384.0

The 5500-2 uses pellet sized activated carbon with far more surface area for adsorption where the C909 uses crappy and far less effective mesh filters with carbon "infused" in it. The 5500-2 carbon filters are made to last and are washable to reactivate the carbon where the crappy mesh ones last a few weeks at best in most tests and need to be thrown away which is why they give you far more. The pellets will last closer the 6 months. The 5500-2 filters are far easier to find in stock and the C909 uses it's own proprietary filters which are much harder to find.

5500-2 has gone for cheaper than this price too on front page deals in the past.

Personally I would pass on this "deal" and wait for the 5500-2 to go back on sale OR look into the much cheaper and more effective home made Corsi-Rosenthal box as diagramed here: https://cleanaircrew.org/box-fan-filters/ and the effectiveness has been outlined well here: https://mobile.twitter.com/marwa_...5404206090 It outperforms even the large and far more expensive $500+ filters on the market. The 3M Merv 13 (1900) filters have far less static pressure than most merv 13 filters making them the best option for fan filters. This was proven plenty of times by Project Farm testing and can be outlined in this video here: https://www.youtube.com/watch?v=RkjRKIRva58
Last edited by Ohsighrus May 31, 2022 at 02:45 PM.
9
May 31, 2022
12,156 Posts
Joined Nov 2010
May 31, 2022
PeteyTheStriker
May 31, 2022
12,156 Posts
Quote from DwayneD2708 :
Has anyone noticed a difference in air quality with these? They started booming around covid, so I was just wondering if it's a gimmick or not. Isn't the HVAC filter enough?

Do I need one in each room or just the main rooms I'm in?
The HVAC filter is just a first line of defense for most homes, it will take out the big pieces but a lot of fine dust and allergens will still get through. Unless you paid a large large sum of money and have a custom HVAC solution installed in a new construction. These units are a great way to keep certain areas constantly exchanging air and clearing out dust, allergens, and virus. Most people notice a difference especially if the rooms are more self contained and not open concept type rooms.
1
May 31, 2022
1,950 Posts
Joined Jun 2018
May 31, 2022
Ohsighrus
May 31, 2022
1,950 Posts

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

Quote from DwayneD2708 :
Has anyone noticed a difference in air quality with these? They started booming around covid, so I was just wondering if it's a gimmick or not. Isn't the HVAC filter enough?

Do I need one in each room or just the main rooms I'm in?
Quote from PeteyTheStriker :
The HVAC filter is just a first line of defense for most homes, it will take out the big pieces but a lot of fine dust and allergens will still get through. Unless you paid a large large sum of money and have a custom HVAC solution installed in a new construction. These units are a great way to keep certain areas constantly exchanging air and clearing out dust, allergens, and virus. Most people notice a difference especially if the rooms are more self contained and not open concept type rooms.
HVAC filters typically run a Merv 6 or 8 filter which is no where near as effective as a HEPA filter. HEPA filters are closer to Merv 13/14 filters used in hospitals. These filters have too high of static pressure to be used in your homes HVAC system and will blow out the motor pretty quickly. Speak to any HVAC tech and they will tell you how bad your home HVAC is compared to a HEPA or Merv 13 filter. (https://www.youtube.com/watch?v=RkjRKIRva58)

Merv 6 filters remove less than 50% of particles sized 3.0 to 10.0. Merv 8 remove 84% of microns sized 3.0 to 10.0. Merv 13 remove 75% of particles sized 0.3 to 1.0 and 90% of particles sized 1.0-3.0.

HEPA type of air filter can theoretically remove at least 99.97% of dust, pollen, mold, bacteria, and any airborne particles with a size of 0.3 microns (µm). The diameter specification of 0.3 microns responds to the worst case; the most penetrating particle size (MPPS). Particles that are larger or smaller are trapped with even higher efficiency. Using the worst case particle size results in the worst case efficiency rating (i.e. 99.97% or better for all particle sizes).

TL;dr Merv 8 remove as small as 3.0 microns where merv 13 remove as small as 0.3 microns. It's an astronomical difference. Your home HVAC system sucks at removing particles and is only there to prevent the largest of particles causing damage to your ducting.

NOTE: cheap filters especially on Amazon are a huge no no. Use 3M grade filters or you may as well not have a filter at all. These off brand and Chinese non-genuine filters always suck. They don't do anything near what they advertise. They are not independently tested well and will NEVER out perform filters that cost more. Again please see Project Farm's test: https://www.youtube.com/watch?v=RkjRKIRva58
Last edited by Ohsighrus May 31, 2022 at 02:48 PM.
2
May 31, 2022
137 Posts
Joined May 2020
May 31, 2022
BrrFeelsShillyInHere
May 31, 2022
137 Posts
Winix seems to have a huge presence on Slickdeals. Are their air purifiers really that good compared to others, or am I detecting a slight chill?

Not trying to be rude, honest question. Been thinking of getting one for awhile and wondering what sets them apart. If you look at Costco's website they have like 5+ air purifiers on sale at any given time.

Examples:

https://www.costco.com/blueair-bl...39316.html
https://www.costco.com/germguardi...85647.html

https://www.costco.com/germguardi...99381.html

https://www.costco.com/envion-the...26436.html
May 31, 2022
31 Posts
Joined Aug 2021
May 31, 2022
IndigoWeather507
May 31, 2022
31 Posts
How does this compare to blue air 121 which is on sale for $250?

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May 31, 2022
53 Posts
Joined Jun 2015
May 31, 2022
dgcoupe1
May 31, 2022
53 Posts
Quote from Ohsighrus :
Worth noting that the 5500-2 outperforms the C909 even though the C909 has a higher square foot recommendation. The C909 uses almost twice the yearly wattage: of the 5500-2 at 527 kWh/year where the 5500-2 uses 296 kWh/year. Don't get hung up on the room size as it's a gimmick. What matters is efficiency as air isn't limited to a single room as it's ambient and is always constantly moving. You will get far better air exchanges per watt out of the 5500-2 and far better TVOC removal with the pellet filters over crappy infused mesh gimmicks found on most cheaper and less effective models of purifiers. Also most people disable the "plasma wave" gimmicks as they aren't effective or proven to do anything. The HEPA filters and activated carbon is what gives you clean air. The gimmick of adding ions to molecules just means you're going to find a whole lot more dust and particles on your floor rather than in the air, which get stirred up eventually again anyway.

5500-2 used to cost this price on Amazon without a Costco membership, so this "deal" is meh. 5300-2 is also cheaper than this in many locations that don't require a $60 yearly membership. The 5500-2 > 5300-2 as the 5300-2 uses the same carbon filter as the C909 where the 5500-2 uses the pellet washable filters which are far higher quality and effectiveness.

5500-2:
Annual Energy Use (kWh/year): 296.5831304
Room Size (sq.ft.): 360
Smoke-Free Clean Air Delivery Rate per Watt: 4.6
Dust-Free Clean Air Delivery Rate per Watt: 4.86
Pollen-Free Clean Air Delivery Rate per Watt: 4.900398406
Smoke-Free Clean Air Delivery Rate (cfm): 232.0
Dust-Free Clean Air Delivery Rate (cfm): 243.0
Pollen-Free Clean Air Delivery Rate (cfm): 246.0

C909
Annual Energy Use (kWh/year): 527.0729778
Room Size (sq.ft.): 501
Smoke-Free Clean Air Delivery Rate per Watt: 3.6
Dust-Free Clean Air Delivery Rate per Watt: 3.79
Pollen-Free Clean Air Delivery Rate per Watt: 4.261931188
Smoke-Free Clean Air Delivery Rate (cfm): 323.0
Dust-Free Clean Air Delivery Rate (cfm): 336.0
Pollen-Free Clean Air Delivery Rate (cfm): 384.0

The 5500-2 uses pellet sized activated carbon with far more surface area for adsorption where the C909 uses crappy and far less effective mesh filters with carbon "infused" in it. The 5500-2 carbon filters are made to last and are washable to reactivate the carbon where the crappy mesh ones last a few weeks at best in most tests and need to be thrown away which is why they give you far more. The pellets will last closer the 6 months. The 5500-2 filters are far easier to find in stock and the C909 uses it's own proprietary filters which are much harder to find.

5500-2 has gone for cheaper than this price too on front page deals in the past.

Personally I would pass on this "deal" and wait for the 5500-2 to go back on sale OR look into the much cheaper and more effective home made Corsi-Rosenthal box as diagramed here: https://cleanaircrew.org/box-fan-filters/ and the effectiveness has been outlined well here: https://mobile.twitter.com/marwa_...5404206090 It outperforms even the large and far more expensive $500+ filters on the market. The 3M Merv 13 (1900) filters have far less static pressure than most merv 13 filters making them the best option for fan filters. This was proven plenty of times by Project Farm testing and can be outlined in this video here: https://www.youtube.com/watch?v=RkjRKIRva58
5500-2 still being sold at Costoc?
May 31, 2022
2,596 Posts
Joined Jul 2016
May 31, 2022
Meribela_S
May 31, 2022
2,596 Posts
Thanks, will pick one up. Gave these chines branded ones a try and they are shtty. The one i bought off amazom claim over 300 cadr and its pure bs. The fan blows fine but the actual suction from inside was so weak it couldnt pull anything. Checking the filter after two minths and it looks new while my room is covered in dust.
May 31, 2022
7,541 Posts
Joined Dec 2011
May 31, 2022
SAN_MARINO
May 31, 2022
7,541 Posts
Quote from DwayneD2708 :
Why does it need Wi-Fi?
For notification of the filters.
May 31, 2022
306 Posts
Joined Aug 2014
May 31, 2022
sjuled
May 31, 2022
306 Posts
I recently got the c545 from Costco and thought it was ok but I don't have bad allergies so I don't really benefit from these like some do. I returned the c545 and trying out the Westinghouse ncco filter to see if that is beneficial and worth the maintenance cost. Not sure yet.
May 31, 2022
547 Posts
Joined Jul 2007
May 31, 2022
in5ane
May 31, 2022
547 Posts
Quote from DwayneD2708 :
Why does it need Wi-Fi?
as mentioned in product specs,

The WiFi feature allows you to connect your air purifier to the Winix Smart App and monitor the air quality in your home, control your air purifier, and track filter life
May 31, 2022
114 Posts
Joined Mar 2010
May 31, 2022
jumon
May 31, 2022
114 Posts
Quote from sloopjohnb :
wifi allows you to schedule on/off with the app. i like my basement and living room purifiers to be on max high at night, then back to auto during the day. without the wifi app, no way to control

my first thought in this one: anyone have the C909 working in homebridge? i found a plug-in for the c545 that works flawlessly
BTW, Homeassistant has an unofficial HACS integration called "Winix Purifier" that controls the C545 and all its features/sensors quite well. I highly recommend it.
Pro
May 31, 2022
754 Posts
Joined May 2010
May 31, 2022
Efl
Pro
May 31, 2022
754 Posts
Quote from DwayneD2708 :
Has anyone noticed a difference in air quality with these? They started booming around covid, so I was just wondering if it's a gimmick or not. Isn't the HVAC filter enough?

Do I need one in each room or just the main rooms I'm in?
The HVAC filter's primary purpose is to protect the HVAC equipment. You won't get HEPA filters without restricting airflow to the HVAC too much. I've noticed less dust around the house and some allergy relief but I also make sure to vacuum the Winix filters weekly as I've seen dust build up there.

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Jun 1, 2022
708 Posts
Joined Dec 2013
Jun 1, 2022
DwayneD2708
Jun 1, 2022
708 Posts
Quote from PeteyTheStriker :
The HVAC filter is just a first line of defense for most homes, it will take out the big pieces but a lot of fine dust and allergens will still get through. Unless you paid a large large sum of money and have a custom HVAC solution installed in a new construction. These units are a great way to keep certain areas constantly exchanging air and clearing out dust, allergens, and virus. Most people notice a difference especially if the rooms are more self contained and not open concept type rooms.
So, basically a living room that has a hall way and kitchen openings? I should put it in like a bedroom?

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