Winix 5520 review

The Winix 5520 is the current version of the long-running Winix 5500 line, and its best bedroom feature is the light sensor. When the room goes dark, the 5520 drops into Sleep Mode on its own, dims its LEDs and lowers the fan, then returns to Auto Mode when the lights come back on. Winix says the slowest speed runs at 23.5 dB. The four stages include a washable fine mesh pre-filter, an AOC carbon pellet filter for odors, a True HEPA filter and PlasmaWave air cleaning. It is AHAM Verified for 392 square feet, slightly more than the Coway Mighty, and it adds Wi-Fi control through the Winix Smart app. Winix does not list the top-speed noise level on the product page, which makes direct comparison harder. At $259.99 with a 2-year warranty, it suits buyers who want odor control and automatic night behavior.

Who it is for

Bedrooms where you want the purifier to dim and quiet itself automatically when the lights go out.

Price

$259.99 on the Winix US store when checked.

$ 259.99 In stock 5520 quantity Add to cart
Quoted from the vendor pricing page on November 8, 2026.

Key features

• Washable pre-filter, AOC carbon filter and True HEPA filter
• PlasmaWave air cleaning technology, which Winix says produces no harmful ozone
• Winix publishes 23.5 dB on the slowest speed
• Light-sensing Sleep Mode that dims the LEDs and lowers the fan
• AHAM Verified for 392 square feet

Strengths and weaknesses

• Strength: Automatic Sleep Mode needs no app or schedule
• Strength: Carbon pellet filter helps with cooking and pet odors
• Strength: Backed by a 2-year warranty
• Weakness: Winix does not publish the top-speed noise level on the page
• Weakness: PlasmaWave adds an ionizing stage some buyers avoid
• Weakness: Replaced the older 5500-2, so many reviews refer to the previous model

Key facts

• Price: $259.99
• Lowest speed noise: 23.5 dB
• AHAM Verified room size: 392 sq ft
• Max room size: 1,882 sq ft in 1 hour
• Warranty: 2 years

Where it ranks

Winix 5520 is No. 4 in our Best Quiet Air Purifiers verdict.