Winix 5510 vs AM90: Same Price, But Which Should You Buy?

The Winix 5510 and Winix AM90 share the same DNA. Same PlasmaWave technology, similar CADR ratings, nearly identical room coverage. Both now include WiFi app control. On paper, these are almost the same air purifier — which makes the buying decision both easier and harder. The core question is simple: do you want Alexa/Google Assistant voice control?

At $180 for both the 5510 and the AM90, these purifiers sit at the same price point in the mid-range category. Based on our research into published specs, customer reviews, and expert analysis, here is everything you need to know before choosing between these two Winix models.

Head-to-Head Specs

1. Air Cleaning Performance: A Virtual Tie

Both the 5510 and AM90 use the same three-stage filtration system: a washable mesh pre-filter, a True HEPA filter that captures 99.97% of particles at 0.3 microns, and Winix's PlasmaWave technology that generates hydroxyl radicals to neutralize odors and certain VOCs.

The CADR ratings tell the story — the 5510 actually has a slight edge (253/253/253 vs 233/246/250 for smoke, dust, and pollen), and it covers a slightly larger area (392 sq ft vs 360 sq ft). In practice, the difference is modest. According to customer reviews, users report excellent air quality results from both models. You will not notice a meaningful performance difference between these two purifiers in any real-world room.

For a standard bedroom (150-200 sq ft), either purifier delivers outstanding performance. For a medium living room (300-390 sq ft), both maintain effective air changes without struggling.

Bottom line: If you are choosing between these two based on air cleaning ability, the 5510 actually has a slight edge with higher CADR and more room coverage at a lower price.

2. The Smart Feature Divide

Both the 5510 and AM90 now include WiFi app control, which narrows the gap considerably. The AM90's remaining advantage is voice assistant integration — and with both models at $180, there is no longer a price premium for this feature.

What the AM90 adds over the 5510:

• Alexa and Google Assistant — Voice commands for power, fan speed, and mode changes

What both purifiers share:

• WiFi app control — Remote control from anywhere, real-time air quality monitoring on your phone, scheduling, and filter life tracking
• Auto mode — Both have built-in air quality sensors that automatically adjust fan speed based on detected particle levels
• Air quality LED indicator — Both display a color-coded LED showing current air quality (blue for good, amber for moderate, red for poor)
• Sleep mode — Both dim the display and run on the lowest fan speed
• PlasmaWave on/off toggle — Both let you disable the ionization feature

The 5510 is a fully connected purifier with its own built-in air quality monitor and WiFi app control. Being able to check your home's air quality from your phone, turn the purifier on before arriving home, or set weekly schedules through the app are features shared by both models. Based on our research, the sensor in both models performs reliably, ramping up quickly when cooking fumes or dust are detected and settling back to low speed when air quality stabilizes.

The AM90's voice assistant integration is a genuine convenience for smart home users. If you regularly use Alexa or Google Assistant, being able to say "turn on the purifier" adds value. But this is a convenience feature, not a performance feature. It does not make the air any cleaner.

3. Filter Compatibility and Long-Term Costs

Both the 5510 and AM90 use the same filter type, which is a significant advantage for Winix buyers who might upgrade later or own both models. The True HEPA filter and the washable activated carbon filter are interchangeable between the two units.

With identical purchase prices and filter costs, the total cost of ownership is virtually the same. Energy consumption is nearly identical, and the washable pre-filter and carbon filter in both models reduce ongoing expenses compared to purifiers that require disposable carbon replacements.

Over three years, the 5510 and AM90 cost the same to own. The only question is whether you prefer the 5510's slightly higher CADR and quieter low speed, or the AM90's voice assistant integration.

Important note on replacement filters: Both models use widely available HEPA replacement filters that can be purchased on Amazon and other retailers. Winix also sells filter bundles that bring the per-filter cost down. The washable carbon filter is a standout feature on both — most competing purifiers in this price range require $15-20 disposable carbon filter replacements every 3-6 months.

4. Noise Levels: The 5510 Is Quieter on Low

Based on published specifications, the 5510 is notably quieter on its lowest setting at approximately 23.5 dB compared to the AM90's 28 dB — making the 5510 essentially inaudible in a quiet bedroom. However, on its highest setting the 5510 reaches 65.7 dB compared to the AM90's 54 dB, meaning the AM90 is the quieter option when running at full speed.

Sleep mode on both models dims the LED display and locks the fan at the lowest speed, making either purifier suitable for overnight bedroom use. For light sleepers, the 5510's 23.5 dB low setting gives it an edge. According to customer reviews, the vast majority of users find both models quiet enough for sleeping.

5. Design and Build Quality

The 5510 and AM90 share a similar design language — both are rectangular tower-style purifiers with top-mounted controls, front-facing air quality indicators, and a dark exterior. The AM90 is slightly more refined in its design details, with a marginally slimmer profile and updated control panel, but the differences are subtle.

Both purifiers are well-built based on customer feedback, with solid construction that holds up over years of daily use. Neither feels premium, but both feel reliable — exactly what you want in a mid-range appliance.

The 5510 weighs 15.4 lbs and the AM90 weighs 15 lbs. Both are easy to move between rooms with one hand.

6. PlasmaWave: What You Should Know

Both models include Winix's PlasmaWave bipolar ionization technology, which generates hydroxyl radicals to help break down odors, allergens, and some chemical vapors on a molecular level. Winix states that PlasmaWave produces no harmful ozone, and independent testing has generally confirmed that ozone output falls well below the California CARB safety threshold.

That said, if anyone in your household has severe asthma, respiratory sensitivities, or if you keep pet birds, it is worth disabling PlasmaWave on either model. Both purifiers work perfectly well as pure mechanical HEPA + carbon filters with PlasmaWave turned off. The dedicated button on both models makes this easy — press once to disable, press again to enable.

Who Should Buy Which

Buy the Winix AM90 ($180) if:

• You use Alexa or Google Assistant and want voice control integration
• You are building a connected smart home ecosystem and want voice commands
• You value the AM90's quieter high-speed operation (54 dB vs 65.7 dB)

Buy the Winix 5510 ($180) if:

• You want the best CADR and room coverage between these two models
• You want the quietest possible low-speed operation (23.5 dB vs 28 dB)
• You do not need voice assistant integration
• You prioritize slightly higher CADR (253 vs 233 for smoke)

The Bottom Line

The Winix 5510 and AM90 deliver the same clean air. Both include WiFi app control, PlasmaWave technology, HEPA filtration, and identical filter costs — and now they share the same $180 price point. The decision comes down to one thing: do you need Alexa or Google Assistant voice control?

If the answer is yes — if you want to control your purifier with voice commands through your smart home ecosystem — the AM90 is the obvious choice at the same price.

If the answer is no — if app control from your phone is all the smart connectivity you need — the 5510 gets you slightly higher CADR, more room coverage (392 vs 360 sq ft), and quieter low-speed operation.

For buyers who do not use voice assistants, the 5510 at $180 offers slightly better specs. For smart home enthusiasts, the AM90 at $180 adds Alexa and Google Assistant integration at no price premium — making it the easy pick for that audience.

This guide was researched and written by the AirQualityNest editorial team. We update our content regularly to reflect the latest products, pricing, and research.