Winix 5510.

The Gavler Review.

Winix 5510 Review: The 5500-2's Successor, With a Catch

The Winix 5510 is the direct successor to one of the most beloved budget air purifiers ever made, the discontinued 5500-2, and it mostly earns the inheritance. It matches its predecessor's tested top-speed cleaning, adds WiFi and app control the old model never had, and does it in a smaller, better-looking body — all for around $200. The catch: it's louder at that top speed than the model it replaces, and its cleaning performance sags at the quiet fan speeds most people actually leave running overnight. If you loved the 5500-2's price-to-performance ratio and can live with running it a notch louder than you'd like at night, the 5510 is the obvious pick. If you're a light sleeper who ran the old one on low all night, it's worth a longer look at the alternatives first.

What it is

Winix built its reputation on one thing: purifiers that clean fast for not much money, with a no-nonsense mechanical filter stack instead of gimmicks. The 5500-2 was the poster child for that approach for years, and when it was discontinued, the 5510 stepped in as the natural replacement — same three-stage mechanical filtration (washable pre-filter, 226-gram activated carbon layer, True HEPA), plus Winix's switchable PlasmaWave bipolar ionization if you want it, and now WiFi connectivity through the Winix Smart app for scheduling, remote control, and filter-life tracking. A gas sensor triggers auto mode, and a light sensor drops the unit into sleep mode when the room goes dark.

In use / performance

The number that matters most here is independently tested, not just claimed. HouseFresh clocked the 5510 clearing fine PM1 particulate to near zero in about 24 minutes on top speed — a tested top-speed CADR near 249 CFM, good for roughly five air changes per hour in rooms up to about 373 sq ft. That's a direct match for what the old 5500-2 could do, and HouseFresh noted it holds its own against pricier mid-sized rivals in the same test.

Where the numbers get less flattering is at the fan speeds people actually leave running through the night. HouseFresh found "its air cleaning performance drops when running at sub-45 dBA fan speeds" — the exact range you'd choose for a bedroom. And at the other end of the dial, the 5510 measured 67.2 dBA on turbo, which HouseFresh flagged as louder than similarly sized purifiers from Winix and other brands. So you're choosing between fast, loud cleaning or quieter, slower cleaning — there's less of a sweet spot in the middle than the 5500-2 offered.

Strengths

The 5510's core case is still a strong one. Winix Smart app control (iOS and Android) handles scheduling, remote operation, and filter-life tracking without the in-app ads that clutter some rival apps — a small but real quality-of-life win. The filter swap is simpler than before, too: instead of the old two-cartridge design, the 5510 uses a single combined Filter Q set (pre-filter, carbon, and HEPA together) rated for about twelve months at roughly $80, landing all-in running cost near $141 a year — reasonable for the category. And at 13 lbs with a smaller, cleaner-looking chassis, it's an easier fit for a bedroom shelf or nightstand than the boxier units nearby on this list.

Trade-offs — who should skip it

If you're a light sleeper who ran a purifier on low overnight, this isn't the clear upgrade the "successor" label implies. HouseFresh's own summary is blunt: "The Winix 5510 offers less powerful air cleaning performance at louder operation than older mid-sized Winix models." Buyers in that camp should look at the quieter Winix T810, or step over to a Levoit model built around low-speed performance. The app itself is also still fairly bare-bones next to what Levoit and Xiaomi offer, so if smart-home depth is the priority, look elsewhere.

How it compares

Within Gavler's own Best Air Purifiers list, the 5510 sits at rank 6, a clean value pick below the more expensive, more capable Molekule Air Pro and IQAir HealthPro Plus above it. At 373 sq ft of rated coverage, it's meaningfully smaller-room-focused than the Coway Airmega 400S or Levoit Core 600S on the same list — both worth cross-shopping if your space runs larger than a bedroom or small living room.

The Gavler verdict

The Winix 5510 earns an 8.3: it's a legitimately strong, good-looking mid-range purifier that keeps the 5500-2's fast-cleaning DNA and adds real app control, but it's a lateral move rather than a straightforward upgrade — louder at top speed, weaker at the quiet speeds that matter most overnight. Buy it if you want proven Winix cleaning power at a fair price and don't mind running it a notch louder than the old model. See where it ranks on our Best Air Purifiers list, and if you sleep light, cross-shop the Winix T810 or a Levoit unit before you commit.

Common Questions

Is the Winix 5510 as good as the old Winix 5500-2?

On raw top-speed cleaning, yes — HouseFresh measured it clearing fine PM1 particulate to near zero in about 24 minutes, matching the discontinued 5500-2. But it's louder at top speed and its cleaning performance drops off more at the quiet, sub-45 dBA fan speeds most people actually run overnight, so it's a lateral move rather than a clean upgrade.

How big a room can the Winix 5510 handle?

Winix rates it for about 373 sq ft at five air changes per hour, which puts it squarely in bedroom and small-living-room territory. For larger open-plan spaces, the Levoit Core 600S or Coway Airmega 400S are better fits.

How much does it cost to run the Winix 5510?

The single combined Filter Q set (pre-filter, carbon, and HEPA in one) is rated for about twelve months and runs around $80 to replace, putting all-in yearly running cost near $141 — mid-pack for the category.