Winix Air Purifier with WiFi – Costco Sale!

by Rhonda

*UPDATE* 7/26/22.
The Winix Air Purifier from Costco is WiFi enabled so you can control it with the Winix Smart App to monitor indoor and outdoor air quality, set timers, or just use it as a remote. This latest Costco air purifier has a 4-stage filtration system that captures airborne particles and pollutants while neutralizing bacteria and viruses. Plus, this Costco package includes a 2-year filter supply!

Winix Air Purifier C545 | Costco

Costco’s Price and Sale Dates

*UPDATE* 7/26/22.
The Winix Air Purifier C545 is on sale at select Costco locations for $99.99, from August 3, 2022 through August 28, 2022. That is $30 off Costco’s regular price of $129.99. Item #1449587. While supplies last.

I spotted this item at the Covington, Washington Costco but it may not be available or may not be on sale at all Costco locations. Prices may vary by location. When in doubt, call your local Costco before you go.

Winix Air Purifier C545 | Costco Sale Price

Winix Air Purifier Features

  • 4-Stage filtration system
  • Smart Sensor measures and adjusts the fan speed (low, medium or high) in real time
  • Air Quality Indicator: LED light changes based on air quality (Blue= good, Yellow- fair, Red= poor)
  • Sleep Mode Operation: when the room is darkened, the unit activates Sleep Mode for quiet and energy-efficient operation
Winix Air quality numbers | Costco

4-Stage Filtration System

  1. Fine Mesh Pre-Filter: This permanent filter is the first line of defense against the largest particles and is washable.
  2. Activated Carbon Filter: This filter absorbs VOCs and household odors.
  3. True HEPA Filter: This filter captures 99.97% of airborne particles and pollutants as small as 0.3 microns such as pollen, dust, cigarette smoke, odors, pet dander, mold spores, and organic chemicals.
  4. PlasmaWave Technology: PlasmaWave Air Cleaning Technology creates Hydroxyls to neutralize bacteria and Influenza A virus (H3N2)
Winix Air Filter 4 Stage Filtration System | Costco

When do the filters need to be changed?

It is recommended to change the Activated Carbon Filter at least once every 3 months and the True HEPA Filter at least once every 12 months. This Costco package includes a 2-year filter supply with 8 Activated Carbon Filters and 2 True HEPA Replacement Filters.

Winix Air Purifier C545 | Costco Display


  • Coverage: 360 sq ft
  • Dimensions: 13.7″ D x 20.5″ H x 8.4″ W
  • Weight: 11.5 lbs
  • Noise level: 54 dBA
  • AHAM certified and Energy Star compliant
  • Model C545

Other options may be available at for a delivered price. While supplies last.

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