Winix P450 Review

Under the FresHome series, Winix P450 is the top range air purifier (or air cleaner) with the highest capacity in its class. Designed to cover large area of room, Winix P450 air purifier is one of the consumer all-time favorite model for living room or large bedroom credit to its filtration efficiency and smart pricing. With the combination technology of True HEPA filter and PlasmaWave, let's find out how effective Winix FresHome P450 is in dealing with common pollutants such as dust, bacteria and allergens.
± 329.99 p
     Annual filter ^    
± 90 p
Online price*
Latest Amazon price

Winix P450 Specification

ProductWinix P450
RSPMRSP/ RSP +- 329.99
18.8 x 25.6 x 11.7 in
(47.8 x 65 x 29.7 cm)
Weight18.7 lb (8.5 kg)
Coverage (up to)450 sq. ft. (42 m2)
Dust free (CADR)298 cfm (506 m3/h)
Pollen free (CADR)343 cfm (583 m3/h)
Smoke free (CADR)291 cfm (494 m3/h)
Airflow speed50-290 cfm (85-493 m3/h)
A filterAnnual filter cost ($)+- 90
- Lifespan
- Replacement cost ($)
Odor control carbon pre-filter
3 months
HEPA filter
- Lifespan
- Replacement cost ($)
True-HEPA filter
1 year
Carbon filter
- Lifespan
- Replacement cost ($)
Ionizer/ TechnologiesPlasmaWave Technology
UV-light/ PCO
Other filter
All-in-one filter
- Lifespan
- Replacement cost ($)
Filter E 113250 Replacement Filter
1 year
+- 89.99
Optional/ Addon
Noise level27 - 60 dB
Power consumption11 - 110 W
Timer/ Scheduler
SensorsVOC sensors (Air quality)
More color options
Auto mode
Air qualityAQ indicator
Filter change indicator
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty3 years
Email/ Phone support

Product image

Winix P450 key features

  • 3-stage filtration with PlasmaWave Technology
  • True HEPA filter
  • Deodorization odor control carbon pre-filter
  • 4 fan speeds (Low, Medium, High, Turbo)
  • Auto mode/ Sleep mode
  • VOC sensor/ light sensor
  • Remote control
  • 3 years warranty with optional upgrades

The starters

Winix P450 dimension
18.8 x 25.6 x 11.7 in
(47.8 x 65 x 29.7 cm)
Winix P450 weight
18.7 lb (8.5 kg)

A clean and modern-looking air cleaner that you would grow fond of. Winix P450 classic 18.8 x 25.6 x 11.7 in air purifier size and 18.7 lb weight is bigger, heavier than Winix P300 but still far from clumsily bulky. Sturdy build quality with front cover perfectly fitted without any leakage sign. Common features includes 3-stage PlasmaWave filtration, 4 fanspeed with auto/ sleep mode, VOC sensors, digital display with filter replacement indicator, remote control, Ozone-safe certified by CARB, AHAM certified, ENERGY STAR rated and 3 years warranty.

Airflow, CADR and everything in between

Winix P450 coverage
Purifying coverage
450 sq. ft. (42 m2)
Winix P450 airflow speed
Airflow speed
50-290 cfm (85-493 m3/h)
Winix P450 fanspeed
Identical to Winix U450, Winix P450 terrific 450 sq. ft. purifying coverage is well-suited for large-size room, offices or bedroom. Selecting from the 4 fanspeed (Low, Medium, High, Turbo) or choose Auto mode for auto speed selection based on the surrounding air quality; Sleep mode with auto dim indicator light when there is no light source. Both Auto/ sleep mode are sensors dependent.
Winix P450 dust CADR
298 cfm (506 m3/h)
Winix P450 pollen CADR
Pollen CADR
343 cfm (583 m3/h)
Winix P450 smoke CADR
Smoke CADR
291 cfm (494 m3/h)
Winix P450 CADR is equally impressive that tally with the amazing 50-290 cfm airflow delivery rate. Dust CADR is at 298 cfm, Pollen CADR is at 343 cfm and Smoke CADR is at 291 cfm. For more purifying coverage, CADR and airflow distribution comparison, click on the compare air purifiers link above.

What’s inside count

Winix P450 Pre-filter
Odor control carbon pre-filter
3 months
Winix P450 HEPA filter
True-HEPA filter
1 year
Winix P450 technologies
PlasmaWave Technology
^ Winix P450 filters/ technologies/ lifespan
^ Winix P450 filters/ lifespan/ price
Probably the only let down in Winix P450, it utilize a 3-stage filtration that combines both pre-filter and carbon filter. Large particles such as dust, hair plus odors and gases will all be trapped in the Carbon pre-filter while True-HEPA filter would trap 0.3 micron size particles and allergen such as mold, pollen, spores. Fortunately there is the dependable PlasmaWave that would creates Hydroxyls to take care of waves of allergens, odors and gases without emitting any harmful ozone.

Winix P450 is covered against

Winix P450 VS Dust



Winix P450 VS Pollen



Winix P450 VS Hair

Hair/ Pet hair


Winix P450 VS Dust mite

Dust mites


Winix P450 VS Mold/ Mildew

Mold/ Mildew


Winix P450 VS Pet dander

Pet dander


Winix P450 VS Virus/ Germ

Virus/ Germ


Winix P450 VS Tobacco smoke

Tobacco smoke


Winix P450 VS Chemical



Winix P450 VS VOCs



Winix P450 VS Smoke/ Gas

Smoke/ Gas


Winix P450 VS Odor



Winix P450 3-stage filtration and 450 sq. ft. purifying applicable area is spectacular when pit against allergens, bacteria and viruses. It is vastly efficient on large-scale airborne contaminants e.g. dust, hair, pet hair. However against small scale contaminants, Winix P450 50-290 cfm 4 speed airflow circulation + True-HEPA filter is distinctive at trapping dust mites, pollen, mold, spores, mildew, fungi, germs and pet dander.  On smokes and odors, Winix P450 filtration is weak in dealing chemicals, cooking odors, detegent odors, VOCs, tobacco smokes, cigarette, radon and ammonia.

Keep it down

Winix P450 noise level
Noise level
27 - 60 dB
Winix P450 power consumption
Power consumption
11 - 110 W
Winix P450 11 - 110 W power consumption is higher as with its output capacity although it will also depends on the constant fanspeed you are operating. 27 - 60 dB Noise level is surprisingly very similar with the lower range model so expect little noise in low to medium speed. Again there is sleep mode (with light sensor) so Winix P450 would work quietly in the background during night time.

At what cost

Winix P450 MRSP/ RSP
+- 329.99
Winix P450 annual filter replacement cost
Annual Filter Cost
+- 90
^ Winix P450 replacement filters estimated cost
Winix P450 has a very attractive price tag the could cost almost half of what other competitors is offering at similar range. The bundled (HEPA filter + 4 Carbon pre-filter) filter replacement is not cheap nor expensive, do keep it mind that the Carbon filter will only last for 3 months thus the 4 sheet bundled. For more great Winix P450 and filter deals, visit Amazon website to search for your desired deals.

The challengers

Winix HR950 5-Stage-Air-Cleaner-0

Winix HR950

Up is the 5-stage filtration, particle sensors and timer. Down is the smaller purifying coverage and weaker CADR is the setback you have to take.
Winix HR1000 5-Stage-Wifi-Enabled-Air-Cleaner-0

Winix HR1000

Similar to above with the addition of WiFi support, weaker purifying coverage and CADR is bundled in as well.

Alen Paralda

Comes with wider purifying coverage and Alen lifetime warranty. Disappointing CADR is the air purifier major weak points.

In conclusion......

  • Value for money that cost only half of what similar range competitors is pricing.
  • Wide purifying coverage similar to what Winix U450 is offering.
  • Again great filtration strength on all three CADR (Dust, Pollen, Smoke).
  • 3-stage filtration with PlasmaWave technology
  • Highly efficient True HEPA filter that has no issue capturing bacteria and micron size pollutants.
  • Decent odor control carbon pre-filter that deals with large particles plus odors and gases.
  • Practical features such as remote control and air quality status on digital screen.
  • 4 fanspeed plus Auto mode and sleep mode that would also dim the indicator lights.
  • 3 years warranty.
  • No standalone pre-filter/ carbon filter that could ease the True HEPA filter usage.
  • No built-in timer as with all Freshome series air purifier.
  • Bulkier and heavier than P300 though not by a big margin
  • Requires filter change every 3 months on the carbon pre-filter.
Build quality
Airflow delivery
Particle Filtration
Smoke Filtration

Frequently Asked Questions (FAQ)FAQ

What's the difference between the P450 and the U450?

Other than the obvious design differences, Winix P450 is at the cheaper end with lower annual filter replacement cost. Winix P450 also use carbon pre-filter rather than a washable pre-filter. Winix U450 on the other hand comes with higher price tag at the addition of anti-microbial filtration, 5 years warranty, dedicated permanent pre-filter and AOC Advanced Granular Carbon Filter. See Winix P450 VS U450.

What is PlasmaWave ® Technology?

PlasmaWave is Winix exclusive, patented technology that emit positive and negative ions in order to form hydroxyls. The ions and natural water vapor combination Hydroxyls (OH) will breaks apart chemical, odors, allergens and other airborne pollutants at the molecular level. PlasmaWave is available in all Winix air purifiers and it does not produce any harmful ozone as certified by California Air Resources Board (CARB).

PlasmaWave produces hydroxyls, what is hydroxyls and is it dangerous?

Hydroxyl radical is a safe, naturally-occurring, reactive molecule formed by single oxygen and hydrogen bonding (OH). Winix PlasmaWave would replicate this natural process by producing hydroxyls to eliminate noxious gases including volatile organic compounds (VOCs), deodorize odors and destroy microorganisms like bacteria, mold, mildew. An optional feature where user have the option to activate or deactivate PlasmaWave in Winix P450 air purifier.

Can I turn off the PlasmaWave feature in Winix P450 air purifier?

Yes Winix P450's PlasmaWave feature can be disabled via the control panel.

What does the Winix P450 limited warranty cover?

Winix P450 limited warranty will cover air purifier from manufacturer defect (materials and workmanship) at Winix own discretion. The defective product must be within the warranty period and free from any tampering, accidental damage and mishandling. Proof of purchase date must be presented before any repair or exchange commence. Warranty will be null and void if Winix P450 air purifier is used for non-home or consumer purposes. If you air purifier fulfilled all the stipulated conditions, you may call 1-877-MY-WINIX (1-877-699-4649) for repair validation and arrangement.

Where is Winix P450 air purifier made from?

Winix P450 air purifier is made and manufactured in South Korea.

What is the function of Air Quality Sensor with Auto-Mode?

Air quality sensor or particle sensor detects the level of harmful particles in its surrounding. Using the information collected from the AQ sensor, Auto-Mode would automatically adjust the ideal speed accordingly. That way you get the best of both worlds in performance and energy-efficiency. All Winix air purifiers come with air quality sensor and Auto mode.

Is Winix P450 air purifier wall mountable?

No Winix P450 is not wall mountable.

Does Winix P450 comes with all the filters for this price or do we need to buy the filters separately?

By default, Winix P450 comes bundled with all the filters required for the air purifier to work.

How do you clean the pre-filter?

Winix permanent pre-filter or specific carbon pre-filter can be wash through vacuuming or rinsing. Simply remove the front pre-filter from the air purifier and rinse it with water to clear out all dust particles. The pre-filter must be completely dry (air-dry or hair dryer) before installing back into the air purifier.

Should I vacuum Winix P450's carbon filter or HEPA filter periodically to boost the filters lifespan and usability?

Other than the AOC filter that requires cleaning once every 3 months, there is no need to vacuum the carbon filter or true HEPA filter before replacing them as the filters would be protected by the pre-filter from having contact with larger particles like dust. Furthermore, improper conduct on the carbon or HEPA filter could have a reverse effect that damage the filters usability and re-release the trapped particles like allergens, germs and bacteria out. You would, however need to clean the permanent pre-filter periodically or every 14 days depending on how much dust is accumulated by the filter.

Is Winix P450's True HEPA filter washable?

You should never wash or even vacuum Winix P450's HEPA filter unless it is clearly stated in the instructional manual. HEPA is a type of mechanical filter made completely from thin fibers. The water flow from washing or rinsing would cause irreversible damage to the HEPA filter by pushing the gap between the fibers. With opened gaps between each fibers, the HEPA filter lose its efficiency allowing fine particles like allergens pass through the filter easily.

Where do I find Winix P450 replacement filter?

You can find the replacement filter for Winix P450 from their official website or at Amazon. Always refer to the instructional manual on the correct filter replacement code or through our product specification section.

Can you use an extension cord to power Winix P450?

Yes you can use it on Winix P450 air purifier as long as the extension cord is not damaged or overloaded from too many connected appliances that end up consuming more watts than the cord can take in.

When Auto mode is selected, sleep mode is enabled by default?

When Winix P450 is in Auto mode, sleep mode will also automatically engage when the lights go out. You will have to manually select any of the speed to disable both auto mode and sleep mode.

Winix P450 Troubleshooting

Safety Tips

More on Winix Freshome P450

With the same dimension as Winix U450, Winix Freshome P450 air cleaner is certainly not small in every aspect and placing it in tight places might be issue for some. Most of the exterior is covered with white plastic housing with a black control panel located at the top. Buttons are clearly label and easy to use. There are 2 air inlets located at the side and a wide air outlet located at the top. The filters are changeable and Winix Freshome P450 also came with a remote control for a more convenient usage. Overall the quality of this Korea built air purifier is solid with no off-gassing in any way.Practicality, build quality, durability is up next on just what we will pay attention to. Winix Freshome P450 framework is well installed with no apparent gap. The base feels solid on the ground without any sort of jiggling movement. Despite the confined air ventilation on the air purifier, the air purifier capacity is rather sufficient for standard purifying without having to turn up to maximum speed. When needed, clean the air purifier with a damp rag to do away dust. Utilized mild laundry soap on recurring stains.

Applicable area and airflow

Winix P450
With Winix standard 3-stage cleaning system, any forms of pollutants will be absorbed first through the carbon pre-filter, subsequently filter through HEPA filter and finally the remaining particles will be break apart and release for next round of filtering. With the continuously repeating process, Winix Freshome P450 can delivery from 83.2 m³/h of airflow in low speed setting all the way up to 483 m³/h in high speed setting. With all of the features above, Winix Freshome P450 can cover up to 42 m2 (452 ft2) of applicable area; perfect for medium-size living room or bedroom. When put next with other fairly equivalent segment air purifiers, Winix Freshome P450 purifying applicable radius is moderate. To sum up, there is ample amount of changes you can set to increase the purifying intake and out-take capability in accordance to your environment.

Filters and filtration

Similar to all FresHome series air purifier combination filter that is able to clean and eradicate contaminants rapidly. The carbon pre-filter would absorb large air pollutants and odors thus prolong the HEPA filter lifespan. HEPA filter will effectively catch and hinder terrible home particles and PlasmaWave breaks apart air-borne contaminants before releasing clean air back to the air. In short, any type of dangerous contaminants such as dust, mold, mildew, dust mite, pollen and pet dander will be trap and wipe off.

Noise level and power consumption

Winix Freshome P450 noise level is kept at a low level thanks to the precisely built motor. With minimal noise generated, the air purifier will have absolute zero impact on user’s day to day life. For the record, the air purifier noise level is still tremendously quiet put next with same collection home appliances. Staying with the power input, Winix Freshome P450 power consumption is reasonable given its air circulation efficiency. You will save an abundance of money on electrical bills in long-run. Like other equally low voltage home appliances, the air purifier still has low to acceptable power input.
noise graph

Final thoughts on Winix Freshome P450

Let's talk about the pricing first, it is priced below Winix U450 (Winix top of the line signature series) although not by a far margin. If you compare the spec between the two, you will find that Winix Freshome P450 is rather similar with Winix U450 except for a slightly weaker airflow delivery, 2 years less warranty and 2-stage lesser filtration. There is also complains from other parties on the lack of the ability to turn off the ionizer features which sadly I have to agree to. Put aside all that, Winix Freshome P450 is essentially a good, well-balanced air purifier that will unquestionably improve your indoor air quality.

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