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Compare two products
Pick any two products from our reviews and see specifications, price, buyer ratings and our scores in one table.
Recorded evidence
What separates these listings
- Price snapshot
- $55.99 price gap
- Product A has the lower captured price. This excludes delivery and ongoing costs.
- Editorial assessment
- 0.7-point score gap
- Product B has the higher research score, not a measured performance advantage.
- Specification coverage
- 14 of 16 fields shared
- Shared labels have recorded values on both sides; matching labels do not guarantee matching units or test conditions.
Product A
GermGuardian HEPA Air Purifier Tower - 22" - Gray - AC4825E
- Potential fit
- Small bedrooms and personal workspaces
- Trade-off to resolve
- Limited CADR restricts coverage to small spaces
Product B
WINIX 5520 Air Purifier for Home Large Room Up to 1882 Ft² in 1 Hr
- Potential fit
- Automated particle and odor control in living areas
- Trade-off to resolve
- Effective high-CADR coverage is much smaller than advertised
Side-by-side evidence
16 of 16 recorded specification fields shown
| Side by side |  |  |
|---|---|---|
| Buyer rating | 4.6 | 4.6 |
| Price | $124.00 | $179.99 |
| Our score | 7.3/10 | 8.0/10 |
| Ratings count | 63,635 ratings | 32,642 ratings |
| Brand | GermGuardian | WINIX |
| Best for | Small bedrooms and personal workspaces | Automated particle and odor control in living areas |
| Filtration capability | 8.8/10 | — |
| Effective room sizing | 6.8/10 | — |
| Noise management | 7.0/10 | — |
| Build and controls | 7.2/10 | — |
| Operating economy | 6.5/10 | — |
| Filtration standard | — | 8.8/10 |
| Acoustic profile | — | 8.4/10 |
| Usability and controls | — | 8.2/10 |
| Room sizing integrity | — | 7.0/10 |
| Running cost efficiency | — | 7.5/10 |
| Power Source | Corded Electric | Corded Electric |
| Particle Retention Size | 0.1 micrometer | 0.01 micron |
| Wattage | 55 watts | 50 watts |
| Control Method | Touch | App |
| Filter Type | HEPA, Carbon, UV-C | HEPA |
| Floor Area | 743 square_feet | 1881 square_feet |
| Noise Level | 55 db | 27 db |
| Controller Type | Rotary Dial | Amazon Alexa, Wifi |
| Contaminant Filtration Capability | True | High |
| Special Features | H13 Grade Filter, HEPA filter 99.97%, UV-C Light Traps Bacteria, Up to 743 sq. ft. coverage | PlasmaWave® Technology, Smart Sensors, Auto Mode |
| Software Update Supported to Date | unknown | unknown |
| Filter Class | HEPA | HEPA |
| Model Number | AC4825E | 5520 |
| Brand Name | GermGuardian | Winix |
| Manufacture Year | Not recorded | 2025 |
| Number of Packs | Not recorded | 1 |
| Our verdict | This compact tower relies on true HEPA media, making it capable of capturing 0.3-micron particles rather than relying on loose 'HEPA-type' claims. The narrow form factor fits tight corners, but the modest CADR limits its efficacy to small rooms. Factor annual replacement filter costs into the modest upfront purchase price. | Priced slightly above the 5510, the 5520 provides the same underlying True HEPA and carbon architecture with integrated air quality monitoring. Automated fan adjustment is practical, but the high coverage claim remains tied to an impractical single air change per hour baseline. Verify filter replacement bundle availability, as proprietary replacements represent the primary long-term expense. |
| Pros and cons |
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Prices and buyer ratings are captured snapshots. A dash means the detail was not recorded, not that a feature is absent. Editorial scores are research assessments, not laboratory measurements.
Sources and limits
This page summarizes our research reviews of Amazon listings, listed specifications and captured buyer ratings. It is not a hands-on test. Scores are editorial assessments, not measured performance; prices are recorded snapshots and may change. A category can include both main products and accessories, so its overall price range is not the cost of a complete setup.
Most recent product record update: October 3, 2026. Individual records may be older; this is not a verification date for every claim. Prices on this page were read from the listings Nov 12, 2026 – Nov 13, 2026.
- Amazon listing: GermGuardian HEPA Air Purifier Tower - 22" - Gray
- Amazon listing: WINIX 5520 Air Purifier for Home Large Room Up to 1882
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