The most powerful Winix U300 (Winix WACU300) to date is packed with the latest air filtration process and enough performance for those unable to afford a fully fledged flagship. It is the first representative of the Winix Signature Series, which is also the premium offering of the older Winix P300. So we will see if this air purifier will be, again, the best bang for the buck in Winix lineup, even compared with its cheaper siblings in our Winix U300 Review.
UPDATED: The Winix U450 is now the best air purifier in Winix Signature Series.
In Breathe Quality, we have reviewed all air purifiers under these sections. Also, we guarantee that:
- We do give honest reviews (both pros and cons) so anyone will guarantee to have the wisest choices.
- We do not (and never) exaggerate one product just to let you click the links and buy that product blindly.
- Powerful air filtration process
- Clean design
- Great value
- Slick interface
- Some still claim that PlasmaWave irritate asthma
- High filter replacement cost
Since 2003, Winix is not a strange name of air purifiers in the U.S. It is not a bluff to say the Winix is the best Asian air purifier brand in the U.S market right now, especially when others like Coway or Sharp don’t try to bring more of their air purifiers to expand in the North America. The Winix U300 inherits all the greatness of the previous Winix P300, and improve the internals to solve even the hardest task in air cleaning. I hope you are ready for our Winix U300 Review.
Winix U300 Price
Of all air purifier brands outside of the U.S, Winix is undeniably the most active one. The Winix U300 is the next-gen air purifier, an impressive air purifier to replace the old Winix P300. It is the evidence that the gap between flagships and budget air purifiers is still closing.
The thing is, the “U” part of the name doesn’t mean anything you can think of for one air purifier in Signature Series of Winix. “Upgraded” is the most suitable word for Winix U300, but is that really enough to justify the change in the price? Let’s take a closer look.
The Winix U300 has a price of $259, but it has dropped to only $220 on sale in Sylvane or Amazon, so the price at the moment is nearly the same with the old Winix P300. Be sure to check our deal to have the best and up-to-date price of this Winix U300.
With only $259, the Winix U300 is apparently the most affordable Winix air purifier with the next-gen 5-stage air cleaning system. You should notice the new Winix NK100 is $299 with only 4 stages in air filtration system, or the Winix HR950 and Winix WAC9500 cost you around $329 for the same 5-stage system.
Though the Winix U300 is one of the most well-rounded air purifiers you can purchase if you’re on a budget or otherwise, it has many competent contenders in the low-range market. The Honeywell HPA300 and Coway AP-1512HH are the best budget long-term investment in 2019, with the fantastic performance that match the Winix U300 easily. We also have here the Philips 1000i, Blueair Sense+ and Levoit LV-PUR131S as the budget smart air purifiers to choose, and I must admit that whatever you opt-in for your home, it is certainly a wise option.
Related post: Best air purifiers in 2019.
Winix U300 Design and Size
It has been a long time from the original Winix P300, and the Winix U300 is still easily mistaken. There is no difference between them, and you can only differentiate one from another by the larger depth of Winix U300. Actually, the Winix U300 is 10.4 inches in depth, while the previous Winix P300 is only 8.7 inches. Other dimensions, however, remain the same in Winix U300.
To spot the difference, you can check for the new logo of Winix U300 Signature on front of this air purifier. The material to make these air purifiers, especially the Korean air purifiers, are mostly the same. There is a tough, smoothly curved plastic frame around the air purifier front.
Just like any other Winix air purifiers, for example the Winix 5300-2, Winix 5500-2 and Winix C535, Winix U300 uses the classic bottom-to-top air flow system concept. Under the front plate, Winix U300 uses the 360° air intake to improve the efficiency of pulling polluted air.
The lean-on-top control panel of Winix U300 has some minor improvements to the old versions of Winix FresHome, however, it is nearly identical to the old one.
Winix U300 weighs 13.4 lbs, and you can lift it and move it around your home with the built-in handle.
Related post: Best air purifiers for bedroom.
Winix U300 Filters
To decide the performance of one air purifier, normally we will look at the quantity of air filters, as well as its air filter types. The Winix U300 differs from the old ones thanks to the powerful 5-stage air cleaning system, just like the Winix WAC9500.
- Pre-filter – The polluted air must pass through a pre-filter. This pre-filter will help capture the large objects of contaminants, such as pet hair and even some kinds of pet dander. This filter can be washable to work permanently.
- CleanCell Anti-Bacterial Treatment – Though this is not a physical filter, the treatment also provides a layer of protection to your air quality.
- True HEPA filter – The True HEPA Filter that captures 99.97% of down to 0.3 microns allergens, virus particles, pollen, mold and fungi particles.
- Activated Carbon filter – Made of high-grade granular activated carbon, this Activated Carbon filter will eliminate odors and smokes, also reduce the common household chemicals.
- Winix PlasmaWave – This technology is one kind of ionizer, which can further reduce the amount of pollutants. Can be switched on/off.
First, the Winix U300 uses a real washable pre-filter that can effectively traps large particles such as pet hair, lint, dust and fibers. The filter cassette has a mesh shield to improve the performance and significantly inhibit the growth of impurities on surface of HEPA filter. Moreover, the innovative CleanCell antimicrobial treatment of Winix covers the pre-filter, to reduce the development of bacteria, fungi, mildew, molds and dust mites.
As the core of the Winix U300’s air filtration system, we have the combination of both True HEPA filter and a premium quality carbon filter to adsorbing and neutralizing strong odors caused by ammonia, and bacteria. The Activated Carbon filter can last for 1 year with regular washing.
The last but not least, Winix U300 makes use of the powerful patented PlasmaWave technology. This treatment can remove airborne viruses, chemical vapors, gases, and remaining odors by naturally forming hydroxyls to neutralize the pollutants at the molecular level, and turn them into the water.
We have experienced the powerful 5-stage air cleaning system in the top dogs of this Korean company, especially in the Winix AM90, Winix HR950 and Winix HR1000. But I still tested the Winix U300 with the most careful test, in a room of 200 square feet for 1 hour. I also locked the Coway AP-1512HH, Honeywell HPA300 and AeraMax 300 to compare with this air purifier. As you can see from the chart below, the Winix U300 has the same efficiency as the Coway AP-1512HH and Honeywell HPA300 as 99.95% for trapping any particles down to 0.3 microns. This is also the same performance of the latest Winix C555. The AeraMax 300 and even Winix 6300-2 has the lower efficiency, with only 99.93%.
With the new air filtration process, the Winix U300 will cost you much more than the Winix P300, and you can buy the Filter B for $89. The air filter cost is quite higher than many air purifiers in the same price range, like the Coway AP-1216L or Coway AP-1512HH. Actually, the air filter cost for one year of use is equal to a $479 Oransi Max, which is really high for a low-range device.
Related post: Best air purifiers for allergies.
Winix U300 Room Coverage
Just like the old Winix P300, the air purifier of Signature Series is suggested for a room size of 300 square feet. Such room coverage is recommended for many air purifiers in this price range, like Honeywell HPA200, AeraMax 300 or even Coway AP-1216L.
The ACH of Winix U300 is 4X. For an air purifier with high fan power, the Winix U300 can exchange the air in your room every 15 minutes.
The CADR of Winix U300 is 197 Dust/ 197 Smoke/ 214 Pollen (cfm). The CADR rating of Winix U300 is not as high as the Winix HR950 or Winix AM90, but it is still enough to clean a room of 300 square feet quickly.
Related post: Best large room air purifiers.
Winix U300 Sound
In real use, I’m always happy with the silent operation of Winix air purifiers. The Winix U300 is not an exception, and for example of one day, we can use this air purifier in our lab without any interference.
This is because of the noise level of only 28 decibels on lowest fan speed of Winix U300. Even if you are running this air purifier on highest speed, the noise level is just 52 decibels (db), such noise level of very normal conversation at home. As you can see, the Winix U300 is another silent air purifier of this brand.
Winix is an air purifier brand with fame in making low noise level air purifiers. Even with a much more fan power, this company improves the fan to reduce the noise level as low as possible. This is also the effort Winix tries to do to reduce the ozone emission from their PlasmaWave technology.
If you plan to run this Winix U300 in your bedroom or your office, I believe that you won’t be distracted by the noise it makes.
Related post: Best air purifiers for office.
Winix U300 Power Consumption
One of our most FAQs is “Do air purifiers use a lot of energy?” In fact, air purifier must be used for a long time to be efficient. And power consumption is one important criteria to review if this air purifier is good or not.
The Winix U300 has the same power consumption as the old Winix P300, for only 60 watts. It is still better than the power consumption of the Winix 5300-2 or Winix 5500-2 with 70 watts, and especially if you compare with the Winix U450 and Winix P450 (110 watts).
However, the lowest speed of Winix U300 only consumes 4 watts, which really impresses me. Again, you should remember the Winix U300 is an air purifier with Energy Star rating.
For using Winix U300 8 hours per day, it would cost you around $22 per year.
Related post: Best air purifiers for pets.
Winix U300 Additional Features
Like other Winix air purifier devices, the Winix U300 uses the accurate Smart Sensor to detect the slightest change of indoor air quality, and respond with a visual light notification in the LCD control panel. Winix call this function “Set and Forget”, because you can just turn the Auto Mode on, and just let the air purifier choose the best fan speed automatically for your home air.
To help control the Winix U300 much easier, this company also gives us a remote control in the box, to adjust the settings comfortably from a distance of 20 ft.
Next, we should mention the dimming light sensor by running Auto Mode. All the LED indicator lights can be dimmed for the overnight hours, so they won’t disturb you while you sleep.
And finally, you still have the LED indicator for filter replacement in this Winix U300.
Winix U300 Customer Service
Established over 40 years ago, in 1973, the Winix company is truly an expert in air purifier industry. They have many headquarters, not only from Korea but also from both the U.S and Europe. ou can reach them both via phone or email, from 9 to 5, Monday to Friday. If you have trouble calling them, you can email the Winix America at firstname.lastname@example.org.
In original website, they are selling both new and certified refurbished air purifiers, of course with free shipping in the U.S only. For Winix products, the Winix Limited Warranty is from 1 year to 5 years, depending on the products. During the warranty period, Winix will repair or replace the product if it fails because of a defect in material or workmanship, as determined by Winix. Remember that this warranty will be null and void if the product is used for purposes other than home, consumer purposes.
I can’t believe the Winix U300 can have a very high efficiency compared with the old Winix P300, while remaining the same price. This is also the most affordable air purifier with the signature 5-stage air cleaning system of Winix, so if you are a fan of this Korean brand, you shouldn’t ignore the power of Winix U300, or maybe, the extra large room Winix U450.
Should I buy Winix U300?
Yes, you should buy the Winix U300 if you demand the highest performance from one air purifier. If you need an air purifier to clean your room a lot quicker, you should aim for the Winix U450.
- If you have serious allergies or asthma to airborne pollutants: the Winix U300 is truly powerful with True HEPA filter and its 5-stage air cleaning system.
- If you want a better performance, or better fan power to clean your room faster: you can look for the Honeywell HPA300 and Blue Pure 211 with CADR ratings of higher than 300 cfm.
- If you need an air purifier with a better room coverage: the Alen Paralda and Alen T500 are better with 500 square feet, and you can buy the Blue Pure 211 to cover your room of 540 square feet with ease. Also, you shouldn’t forget the SilverOnyx with 500 square feet room coverage.
- If you need a budget version of this air purifier: you should go for the Winix P150.
- If you need a more silent air purifier: the Winix U300 is truly silent for the price.
- If you care about the annual filter cost and energy cost: the Coway AP-1512HH or Coway AP-1216L are better saving options for you.
- If you love the additional features: you can select between the GermGuardian CDAP5500BCA, Honeywell HPA250B and Blueair Sense+ for both the Smart Wi-Fi connectivity and Smart Sensor functions.
- Cleaning Power
- Power Consumption
Why not buying this Winix U300 – the most affordable Winix air purifier that offers 5-stage air cleaning system?