Winix 5520 Air Purifier: CADR, Noise, Coverage & Specs
Last verified: Aug 22, 2026
Aug 2026
Quick verdict
The Winix 5520 is best suited to medium rooms where high airflow and app control are priorities. Its 252 CFM smoke CADR supports about 391 sq ft at approximately 4.8 air changes per hour. Buyers should separately evaluate filter cost and maximum-speed noise before deciding.
Best for
- Living rooms and medium bedrooms
- App or Wi-Fi control
Consider alternatives if
- You need a verified maximum-speed noise figure
- Filter replacement interval or cost is a deciding factor
- You are planning around the manufacturer coverage claim rather than CADR-based room size
Verified strengths
- 252 CFM smoke CADR (~391 sq ft at ~4.8 ACH)
- 40 dB published minimum noise
- True HEPA, AOC™ Carbon filtration (as published)
- Wi-Fi or app control
Verified limitations or missing information
- Maximum-speed noise is not in our sources
- Filter replacement interval is not verified
Winix 5520 overview
The Winix 5520 is a medium-room air purifier with a smoke CADR of 252 CFM. Based on our CADR-based room-size method, it is suitable for approximately 391 sq ft. It includes True HEPA, AOC™ Carbon filtration, 40 dB minimum noise, and Wi-Fi or app support.
- Smoke CADR
- 252 CFM
- Recommended room size
- 391 sq ft
- Claimed coverage
- 1882 sq ft
- Minimum noise
- 40 dB
- Filter type
- True HEPA, AOC™ Carbon
- Wi-Fi / app
- Yes
- Power
- 50 W
- Dimensions
- 13.59 × 8.27 × 22.17 in
- Weight
- 13.3 lb
- Last verified
- Aug 22, 2026
Winix 5520 CADR and room size
Recommended room size is about 391 sq ft (CADR × 1.55). That is approximately 4.8 air changes per hour in a room with an eight-foot ceiling. The manufacturer figure of 1882 sq ft corresponds to about 1.0 air change per hour at the same ceiling height and is shown separately. Our recommended room size uses approximately 4.8 air changes per hour with an eight-foot ceiling. Manufacturer coverage figures may use a lower air-change rate and are shown separately.
The manufacturer coverage claim is higher than 3× CADR, so it is not used for ranking.
Winix 5520 noise level
Published minimum noise is 40 dB.
Maximum-speed noise is not in our sources.
Winix 5520 filtration
Published filter type: True HEPA, AOC™ Carbon.
Filter replacement interval is not verified in our sources.
Winix 5520 smart features
4‑Stage filtration, Wi‑Fi & Alexa control, True HEPA filter, AOC™ carbon filter
Winix 5520 specifications
- CADR (smoke)
- 252 CFM
- Recommended room size
- 391 sq ft
- Manufacturer claimed coverage
- 1882 sq ft
- Minimum noise
- 40 dB
- Filter type
- True HEPA, AOC™ Carbon
- Power
- 50 W
- Dimensions
- 13.59 × 8.27 × 22.17 in
- Weight
- 13.3 lb
- Wi-Fi / app
- Yes
About Winix air purifiers
Winix models in this catalog are compared by CADR, recommended room size, noise, and filter type.
Winix 5520 comparisons
Compared with the Winix 5500-2, the Winix 5520 has 4% higher CADR.
What is the CADR of the Winix 5520?
Smoke CADR is 252 CFM.
What room size is the Winix 5520 suitable for?
About 391 sq ft at approximately 4.8 air changes per hour with an eight-foot ceiling.
How loud is the Winix 5520?
Minimum reported noise: 40 dB.
Does the Winix 5520 have Wi-Fi?
Yes — app or Wi-Fi features are listed.
What filter does the Winix 5520 use?
True HEPA, AOC™ Carbon.
Methodology
Specifications are compiled from manufacturer documentation, product listings and other cited sources.
How we calculate recommended room size.
Sources
All air purifiers · Winix air purifiers · Best air purifiers for allergies · Methodology