Winix C545 Air Purifier Review In 2022: Get It While It Is Still Available!

One of the pioneer smarter air cleaners from the lineup. Winix C545 Wi-Fi air purifier is a big upgrade over its predecessor. Featuring a complete 4-stage filtration and premium features that you would not expect at this price point. However, it is reaching the end of its cycle with the replacement model already out. So what are the pros and cons of owning one? Why should you still consider getting one over the newer model? Find out all the answers in our full Winix C545 review below.
online price (US)**
±166.00 / 7

(annual filter cost ±60)

** MRSP (Manufacturer's Suggested Retail Price)/ RSP (Retail selling price) is accurate at the time of posting.
^ Annual filter cost is calculated based on filter price and 12 hours of usage. Pricing could vary depending on air quality, usage frequency, and speed.
` The indicated online price guides as follows: $ = under $50, $$ = $50-100, $$$ = $101-200, $$$$ = 201-300, $$$$$ = $301-400, $$$$$$ = 401-500, $$$$$$$ = over $500.

Winix C545 Wi-Fi Specification

ProductWinix C545 Wi-Fi
13.7 x 20.5 x 8.4 in
(34.8 x 52.1 x 21.3 cm)
Weight11.5 lb (5.2 kg)
Coverage (up to)360 sq. ft. (33 m2)
Airflow speed
Dust free (CADR)243 cfm (413 m3/h)
Pollen free (CADR)246 cfm (418 m3/h)
Smoke free (CADR)232 cfm (394 m3/h)
Humidifying(H) speed
- Lifespan
- Replacement cost ($)
HEPA filter
- Lifespan
- Replacement cost ($)
True HEPA filter
1 year
Carbon filter
- Lifespan
- Replacement cost ($)
Activated Carbon Filter
3 months
Ionizer/ TechnologiesPlasmaWave Technology
UV-light/ PCO
Other filter
All-in-one filter
- Lifespan
- Replacement cost ($)
Filter S Replacement Set
1 year
+- 59.99
Optional/ Addon
Noise level27 dB
Power usage level5-70+ W
Timer/ SchedulerNo
SensorsDual Smart Sensors
Auto mode
Air qualityAQ indicator
Filter change indicator
More color options
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty2 years
Email/ Phone support

Key Features

  • 4-stage filtration with PlasmaWave Air Cleaning Technology
  • 5 fan speeds with Auto mode
  • WiFi enabled (Winix Smart app)
  • Air quality indicator - Blue (good), Amber (fair), Red (poor)
  • Washable Fine Mesh Pre-Filter
  • True-HEPA filter
  • Activated Carbon Filter
  • 5 fan speeds with Auto mode
  • Automatic Sleep mode
  • Dual Smart Sensors
  • 2 years warranty

Design And Usability

Winix C545 Wi-Fi dimension
13.7 x 20.5 x 8.4 in
(34.8 x 52.1 x 21.3 cm)
Winix C545 Wi-Fi weight
11.5 lb (5.2 kg)

A beautiful, clean, yet functional air purifier that will not cost you an arm and a leg. Winix C545 is a highly usable air cleaner that will fit in seamlessly in any home. The small 13.7 x 20.5 x 8.4 inches dimension comes with a full air inlet at the front and a top air outlet for complete air circulation. Winix C545 measures air quality with built-in Smart sensors that detect airborne particles, smoke, and VOCs in the room. 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. No problem moving C545 around for room-to-room purifying thanks to its light 11.5 pounds weight. The only thing you have to be careful of is the white casing does stain easily. Keep it away from sunlight to avoid damaging the machine.

Packed with tons of advanced features, Winix C545 WiFi air purifier is easy to use with dedicated buttons and indicators. You can quickly set the 5 variable speeds including an Auto mode that will only run at a higher fan speed when the room air quality drops. With the dual Smart sensor, Sleep mode activates automatically when the room turns pitch black. In sleep mode, PlasmaWave is deactivated along with indicator lights and set the fan speed to the lowest (even lower than low). No timer or remote control here as it is replaced by the Winix Smart app (more on this later). Lastly, there is a standard filter change indicator that will turn red so you know it is time to change the filter.

The biggest change to Winix C545 is the inclusion of WiFi enabled support. You can control the smart device remotely in the office or while you’re coming back home from work. Setting up is slightly tricky but it is a one-off thing. To set up the remote access features, you will need to download Winix Smart App via Google Play or App Store. With your smartphone, you can now manage the air purifier speed, run time, check filter life, and room air quality in real-time. You can also access advanced features such as outdoor plus air quality updates, AQI history log, and useful tips to improve room air quality.

On the whole, Winix C545 is a solid, well-built air purifier model that is designed for everyday use. It is also AHAM Verifide on its air performance, Energy Star certified, UL recognized, and backed by a 2 years warranty for worry-free ownership.

Airflow, Coverage, And CADR

Winix C545 Wi-Fi coverage
Purifying coverage
360 sq. ft. (33 m2)
Winix C545 Wi-Fi fanspeed

Never take clean air for granted. Winix C545 air purifier can ensure consistent airflow throughout the day. At turbo speed, Winix C545 can cover an AHAM Verifide 360 square footage of room space. Ideal for living room, bedroom, kitchen, garage, basement, offices, apartment, and nursery home. For folks that have no breathing difficulty, you can increase the room air cleaning coverage to 1,740 sq. ft. with 2 air changes per hour or every 30 minutes. Vice versa, you can increase to 4 air changes per hour or every 30 minutes for a smaller 435 sq. ft. air cleaning coverage.

BrandPurifying CoverageFan Speed
Blue Pure Fan200 sq. ft.3
Coway Airmega 300S1,256 sq. ft.3
Rabbit Air A3 SPA-1000N1,070 sq. ft.5
Winix AM90230 sq. ft.4
Blueair Classic 405430 sq. ft.3
Blueair Classic 205280 sq. ft.3
Winix C545 Wi-Fi dust CADR
243 cfm (413 m3/h)
Winix C545 Wi-Fi pollen CADR
Pollen CADR
246 cfm (418 m3/h)
Winix C545 Wi-Fi smoke CADR
Smoke CADR
232 cfm (394 m3/h)
Following the airflow path, Winix C545 clean air delivery rate (CADR) is equally as impressive in delivering swift air cleaning. The CADR ratings are at 243 cfm for dust, 246 cfm for pollen, and 232 cfm for smoke. When compared with the latest model, the CADR output is a tad higher than the AM80/ 90 even though you can hardly tell in real life. Anticipate even better air cleaning results with PlasmaWave activated.

Filters And Performance

Don't fix if it ain't broke. Winix C545 air purifier uses the household 4-stage advanced PlasmaWave Technology with an undisputed track record. Starting with the permanent and washable mesh pre-filter that traps large particles in the air like dust, hair, lint. The activated carbon filter focus on absorbing smoke and odors from cooking, pets, diaper, food, cigarette, cleaning products, harmful chemicals e.g. VOCs, radon, asbestos, formaldehyde. It also acts as a protector for the true HEPA filter. The True HEPA filter captures fine PM2.5 particles and allergens in the air including mold, mildew, pollen, pet dander, germs. Lastly, PlasmaWave Technology disperses Hydroxyls to help neutralize bacteria and viruses e.g. influenza strain H3N2. The process is safe, and ozone less as the dual polarity ions harmlessly remove hydrogen from the molecular structure of the pollutants.

Noise And Energy Usage

Winix C545 Wi-Fi noise level
Noise level
27 dB
Winix C545 Wi-Fi power consumption
Power consumption
5-70+ W
Winix C545 air purifier will run quietly when it is in sleep mode. The silent 27 dB is barely audible even when the air cleaner is placed at the bedside. Best of all, you do not have to make any adjustments as Sleep mode activates when lights are out. As an Energy Star model, power usage is low too around 40% more energy-efficient than same category air purifiers. Expect a low $0.05 daily electric cost or $19 annually when running for a continuous 12 hours of operation. Note that the energy usage output will vary depending on the state and mode Winix C545 is regularly on.
Noise TypeDecibels
Winix C545 Wi-Fi27 dB
Breathing10 dB
Rustling leaves20 dB
Whispering/ Quiet library30 dB
Light rainfall40-50 dB
Conversation50-60 dB
Vacuum cleaner/ Hair dryer/ Washing machine65-80 dB
City traffic80-90 dB

Pricing And Maintainence Cost

Winix C545 Wi-Fi MRSP/ RSP
+- 166.00
Winix C545 Wi-Fi annual filter replacement cost
Annual Filter Cost
+- 60
^ Replacement filters/ estimated cost
On paper, the Winix C545 air purifier is the perfect model for common folks like you and me. It has an autonomous mode, strong airflow, dual sensors, and WiFi-enabled for less than 200 dollars. However, availability is scarce as most stores do not carry the model anymore. You will be better off with a Winix AM90 that offers identical specifications and performance around the same cost. Filter cost favors Winix C545 though at only 60 dollars annually for a HEPA filter and a 4 set of carbon filters.
With limited availability, the best place to buy Winix C545 WiFi air purifier is on Amazon as some sellers may still carry the product. You can also find certified refurbished or used models with huge discounts even though we don't recommend doing so. Winix official website is another great alternative but last we checked, it is listed as sold out. Other online retailers are doable as well with standard discount, shipping, and 30-days return policy applied.


  • Inexpensive WiFi enabled HEPA air purifier.
  • Low filter replacement cost (under 60 dollars).
  • Intuitive control with smart features, tracking, and voice command.
  • 4-stage PlasmaWave to support the wide AHAM Verifide air cleaning coverage.
  • Remove fine particles and smoke through its True HEPA filter and activated carbon filter.
  • Low fan speed with auto Sleep mode activation via the light sensor.
  • Made in Korea with 2 years official warranty.


  • Limited stock with only certified models available (Go with AM90 instead).
  • No built-in timer.
  • Requires some learning curve on the WiFi connection and usage.
  • Hassle quarterly carbon filter change.
Winix C545 Air Purifier Review

Max Fernandez

A loving father and a dedicated reviewer for airfuji.com with more than 1000 air purifiers under his belt. Max Fernandez is also one of the million patients currently suffering from asthma. Feel free to nudge him if you have any questions.
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