expired Posted by SplendidLaborer9506 • May 30, 2022
May 30, 2022 10:54 PM
Item 1 of 4
Item 1 of 4
expired Posted by SplendidLaborer9506 • May 30, 2022
May 30, 2022 10:54 PM
Costco Members: Winix C909 4-Stage Air Purifier
+ $5 S/H$160
$200
20% offCostco Wholesale
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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.or
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=RkjRKIR
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Electronics: Costco will accept returns within 90 days (from the date the member received the merchandise) for Televisions, Projectors, Major Appliances (refrigerators above 10 cu. ft., freezers, ranges, cooktops, over-the-range microwaves, range hoods, dishwashers, water heaters, washers and dryers), Computers, Touchscreen Tablets, Smart Watches, Cameras, Aerial Cameras (drones), Camcorders, MP3 players and Cellular Phones (return details will vary by carrier service contract).
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my first thought in this one: anyone have the C909 working in homebridge? i found a plug-in for the c545 that works flawlessly
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