(checked 2026-10-10)The listing's 32,374 ratings appear to be shared with the 5520 and 5530 (Amazon search shows the same count for all three), so they are not 5510-only.
The successor to the hugely popular 5500-2, with fast top-speed cleaning and a basic app, but it is loud on high, weaker at quiet speeds, and its ionizer turns itself back on.
Top complaints
- Loud on high, weaker when quiet
HouseFresh measured 67.2 dBA at top speed, louder than similar-size purifiers, and says cleaning drops at sub-45 dBA speeds. Wirecutter says the 5510/5520 are louder than the Mighty2 and tested worse.
Source: HouseFresh review, Wirecutter - Ionizer and display annoyances
Wirecutter says the PlasmaWave ionizer switches back on every time you power it up, and the display only shuts off on the lowest fan speed.
Source: Wirecutter - Some units fail early
Amazon's review summary says some owners report units running for years while others say it stopped working within days. HouseFresh calls the app bare-bones.
What owners love
- Fast top-speed cleaning
HouseFresh measured 248 cfm PM1 at top speed, matching the 5500-2, and an AHAM PM2.5 CADR of 252 cfm.
Source: HouseFresh review - Quiet, effective in everyday use
Amazon shoppers call it super quiet and effective at cutting dust and odors, and like the automatic sleep mode at night.
- App with no ads, real carbon
HouseFresh found the app intuitive and ad-free, and the filter uses 226 g of pelleted activated carbon.
Source: HouseFresh review
- You run it on high near where you sleep
- You never want an ionizer on
- You want a polished app
- Mid-size rooms around 350 sq ft
- Pelleted-carbon odor filtering
- Value mid-range buyers
Scores (tap for why)
What experts say
- HouseFresh: Worth considering for strong top-speed cleaning and app support, but louder and weaker at quiet speeds than older Winix models.
- Wirecutter (NYT): Dismissed (5520/5510): capable, but tested worse than the Mighty2, is louder, and reverts to ionizing at each power-on.