Winix has been a reputable name in the air purifier industry for years. Their C545 model, available at Costco, is no exception. This air purifier review aims to provide a comprehensive look at the Winix C545 air purifier, focusing on its key Features, user experience, and how it stacks up against other models like the Winix 5500-2.

Winix Air Purifier C545
Winix Air Purifier C545

Key Features of the Winix C545 Air Purifier

Filter System: A Comprehensive 4-Stage Filtration Mechanism

The Winix C545 is not just another air purifier; it’s a state-of-the-art air cleaner that employs a 4-stage air purifier system. This system includes a fine mesh pre-filter, an activated carbon filter, a True HEPA filter, and PlasmaWave technology. This robust combination is designed to capture 99.97% of airborne pollutants, including but not limited to allergens, pollen, and pet dander, as small as 0.3 microns.

The pre-filter is washable and effectively traps large dust and pet hair before they come into contact with the other filters. The activated carbon filter is excellent at absorbing odors and VOCs, making it ideal for kitchens and homes with pets. The True HEPA filter specializes in capturing fine particles and allergens, ensuring that the air you breathe is free from contaminants. Finally, the PlasmaWave technology releases both negative and positive ions to form hydroxyls that attack airborne pollutants such as viruses.

Room Coverage: Designed for Versatility

When it comes to room coverage, the Winix C545 is engineered for medium to large rooms, measuring up to 360 sq ft. This makes it a versatile choice for various air cleaning needs, whether it’s your living room, bedroom, or office. The air purifier comes with built-in Smart sensors that detect airborne particles, smoke, and VOCs, adjusting the fan speed accordingly. The top air quality indicator will illuminate from Blue when air quality is good, Amber when air quality is fair, and Red when air quality is poor.

Power Consumption: Energy-Efficiency at its Best

In today’s world, power consumption is a critical factor to consider when purchasing any electronic device. The Winix C545 is an Energy Star air purifier with a rated power of 65 watts. This ensures that you can run the device all day without worrying about your electricity bill skyrocketing. The air purifier is 40% more energy-efficient compared to other models in the same category, making it one of the best air purifiers in terms of energy consumption.

User Experience with the Winix C545 Air Purifier

Wi-Fi and Winix Smart App

The Winix C545 air purifier comes integrated with Wi-Fi capabilities and a dedicated Winix Smart App. This app is your one-stop solution for tracking, monitoring, and controlling your air purifier. Once you’ve connected your device to the app, you can monitor both indoor and outdoor air quality in real-time. The app also serves as a remote control, offering you full command over your air purifier.

To get started, ensure you have a 2.4GHz wireless router and download the Winix Smart App from the Google Play Store or iTunes App Store. Follow the in-app instructions to pair your device. The app also provides troubleshooting guidance, making it easier for you to resolve any issues you may encounter.

Actionable Steps:

  1. Download the Winix Smart App.
  2. Connect your smartphone to a 2.4GHz Wi-Fi network.
  3. Pair your Winix C545 to the app following the on-screen instructions.

Engagement: Consider watching a setup video provided within the app for a visual guide to connecting your device.

Sleep Mode

For those who are sensitive to noise, especially light sleepers, the Sleep Mode feature is a godsend. When activated, the Winix C545 operates at its lowest fan speed, making it virtually silent. This ensures that your sleep is undisturbed while the air in your room remains clean.

Actionable Steps:

  1. Activate Sleep Mode via the Winix Smart App or directly on the device.
  2. Test the noise level to ensure it’s comfortable for your sleeping environment.

Engagement: A decibel chart comparing the noise levels in Sleep Mode versus other modes can provide a clearer understanding of its benefits.

Auto Mode

The Auto Mode in the Winix C545 is designed for hands-free operation. The device automatically adjusts the fan speed based on the current air quality, thanks to its high-efficiency particulate air (HEPA) sensors. This ensures that you always breathe clean air without having to manually adjust settings every 15 minutes.

Actionable Steps:

  1. Enable Auto Mode via the Winix Smart App or directly on the device.
  2. Monitor its performance for a day to see how well it adjusts to different air quality levels.

Winix C545 vs. Winix 5500-2: A Comprehensive Comparison

When it comes to air purifiers, the Winix C545 and Winix 5500-2 are often pitted against each other. Both models are designed to improve indoor air quality, but they have their unique Features and capabilities. Here’s a detailed comparison to help you make an informed decision.

Filtration System

Both the Winix C545 and 5500-2 employ a multi-stage filtration system that includes a pre-filter, activated carbon filter, True HEPA filter, and PlasmaWave technology. This combination is quite literally more efficient to trap large dust before it contacts with the pre-filter. The 5500-2 has a higher Clean Air Delivery Rate (CADR) of 146, making it more effective in removing smoke and other airborne particles.

Design and Dimensions

The Winix 5500-2 is slightly larger and heavier, weighing 14.8 lbs with dimensions of 15 x 23.6 x 8.2 inches. On the other hand, the Winix C545 is lighter at 11.5 lbs and measures 13.7 x 20.5 x 8.4 inches. Both models are likely to have perforated holes for air intake, aiding in more efficient air cleaning.

Smart Features

The Winix C545 is wifi enabled and works with the Winix Smart App, allowing users to monitor indoor and outdoor air quality. The 5500-2 lacks this feature but compensates with its smart sensors that adjust the fan speed in auto mode based on the current air quality.

Power Consumption

The Winix C545 consumes slightly less power at 65 watts compared to the 5500-2’s 70 watts. Both models are energy-efficient, but if you’re looking to save on your electricity bill, the C545 still runs the bottom-to-top more efficiently.

User Experience

Both models offer a satisfactory user experience, but the 5500-2 edges out in ease of use. It comes with smart sensors and an auto mode feature that adjusts the fan speed based on the air quality, providing a more hands-free experience.


The Winix 5500-2 is generally pricier than the C545, but prices may vary depending on where you buy Winix products.

Both the Winix C545 and 5500-2 are excellent air purifiers, each with its own set of advantages and disadvantages. If you prioritize smart Features and lower power consumption, the C545 is your go-to. However, if you’re looking for a unit with a higher CADR rating and ease of use, the 5500-2 is the better option.


The Winix C545 air purifier is a reliable and efficient device that offers a range of Features designed to improve indoor air quality. Its 4-stage filtration system, Wi-Fi capabilities, and energy-efficient design make it a top choice for anyone looking to invest in an air purifier. Whether you purchase it from Costco or another retailer, this model is a solid investment for a healthier living environment.


Hey there, I'm Kevin, editor of Xievo. I'm passionate about air purifiers and providing accurate information to help readers make informed decisions. In my free time, I love hiking and experimenting with air purifiers in my own home. Thanks for visiting Xievo!

Write A Comment