No current price: sold on Winix's own store ($129.99), which our price feeds do not cover
No current price: sold on Winix's own store ($199.99), which our price feeds do not cover
22 facts in comparison
Winix C610 vs Levoit Core 400S vs Winix AT40
Filter life is the spec that settles this three-way choice. Both Winix models run one cartridge for twelve months and ship with a spare in the box, while the Levoit Core 400S wants a fresh cartridge about every seven months. Over two years of daily running, that is the gap between buying no filters and buying three.
The three belong together because they clean the same size of room. On the AHAM basis of nearly five air changes an hour, they are rated between 358 and 410 square feet, too narrow a spread to choose on, and each has a sensor, an auto mode, an app and voice control. The far larger box figures assume a much slower turnover and describe a room the machine can only influence.
Only the Levoit comes without an ionizer, and in exchange its current revision has dropped the True HEPA claim from the spec sheet, while its heavy cylinder tends to stay in one room. Winix backs the C610's True HEPA claim with a laboratory report, yet publishes no CADR for it and keeps the timer inside the app. The AT40 moves the most air of the three, but its all-in-one cartridge means a clogged pre-filter retires the HEPA and carbon layers with it.
So the Core 400S is the wrong machine for anyone whose doctor or landlord asked for True HEPA on paper, and for a household that wants to budget filters once a year. Both Winix units build in a PlasmaWave ionizer, which rules them out for a buyer who wants no ionizer in the house. The C610 is also a poor fit for anyone who compares purifiers by clean air delivery, since there is no official figure to compare.
Editor’s note
I'd take the AT40 for most living rooms. Its 265 CFM smoke CADR is the highest verified airflow here, and a 22 dB low speed paired with dual sensors lets it sit close to silent for most of the day. Its cartridge is one part a year, which is tidy, but with no washable pre-filter guarding it, the expensive layers go in the bin with the dust. Anyone reading the 1,968 square foot box claim as a whole-floor promise should walk past it.
The C610 is the most sensible filter purchase of the three, with a True HEPA claim backed by a KCL laboratory report. Winix never states its CADR, and the PlasmaWave stage produces trace ozone, measured by Winix at 0.33 ppbv over eight hours. That is very low, but in a bedroom I would switch it off.
The Core 400S has AHAM-verified airflow ratings, and it is the one I would put in the home of an ionizer skeptic. It gives ground on weight, at 6.5 kg, and on a spec sheet that no longer claims True HEPA. Anyone who carries a purifier from room to room each evening should pass on it.
Category strengths
- Winix C610
- Levoit Core 400S
- Winix AT40
Spec wins (head-to-head)
- Winix C610 2
- Levoit Core 400S 1
- Winix AT40 2
Why Winix C610?
- A lighter build ?3.8 kg vs 4.6 kg
- A slightly more compact design ?471 mm vs 483 mm
Why Levoit Core 400S?
- A slightly lower power consumption ?38 W vs 42 W
Why Winix AT40?
- A higher CADR (smoke) ?265 CFM vs 231 CFM
- A slightly higher coverage area ?410 sq ft vs 384 sq ft
Key real-world differences
The spec sheet pulls in both directions. These are the gaps big enough to shape the decision — with the actual figures, and what each one means in real-world use.
- CADR (smoke)Performance— vs 231 CFM vs 265 CFM — 14.7% more for the Winix AT40
Clean Air Delivery Rate — how quickly smoke particles are scrubbed from the air.
- Coverage areaPerformance384 sq ft vs 358 sq ft vs 410 sq ft — 14.5% more for the Winix AT40
The room size the purifier is rated to clean effectively.
- WeightDesign3.8 kg vs 6.5 kg vs 4.6 kg — 41.5% less for the Winix C610
A lighter unit is easier to move between rooms.
- Power consumptionNoise & power45 W vs 38 W vs 42 W — 15.6% less for the Levoit Core 400S
Maximum power draw; lower costs less to run continuously.
Which one should you buy?
There is no single answer — it depends on what you will actually use it for. Match your priority to the pick below.
- Best for performance Winix AT40 takes the category 100 to 71 — driven by CADR (smoke) (— vs 231 CFM vs 265 CFM).
- Best for design Winix C610 takes the category 100 to 70 — driven by weight (3.8 kg vs 6.5 kg vs 4.6 kg).
- The safe all-rounder Winix AT40 wins 2 of 5 categories and tops the overall VS Score at 97.
Where each one falls short
Winix C610
- Power consumption: 45 W vs 38 W vs 42 W
- 3 specs are unreported (shown as Unknown) and excluded from its scores.
Levoit Core 400S
- CADR (smoke): — vs 231 CFM vs 265 CFM
- Coverage area: 384 sq ft vs 358 sq ft vs 410 sq ft
- Weight: 3.8 kg vs 6.5 kg vs 4.6 kg
- 1 spec is unreported (shown as Unknown) and excluded from its scores.
Winix AT40
- No major spec weaknesses in this matchup — the gaps that exist are small.
- 4 specs are unreported (shown as Unknown) and excluded from its scores.
What matters to you?
Drag the sliders to weight each category and re-rank the products to suit your priorities.
Score breakdown
Performance
Filtration
Noise & power
Design
Smart features
Specs last verified September 29, 2026Winix C610: 19 of 22 specs verified (86%)Levoit Core 400S: 21 of 22 specs verified (95%)Winix AT40: 18 of 22 specs verified (82%)Unverified specs show as Unknown — never estimated, never scored
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What reviewers say
The bottom line
For a large living room or an open kitchen and living space, the Winix AT40 is the one to buy, since its extra airflow earns its place and the yearly filter routine keeps running costs low. The Winix C610 suits a slightly smaller room when a certified True HEPA filter is the requirement and a missing CADR figure is no obstacle. Where nobody will accept an ionizer at all, the Levoit Core 400S is the answer, on the understanding that its cartridges come round more often and cost more over time.
The trade-off that decides it is the ionizer against the filter bill. Both Winix machines are cheaper to keep filtered and both carry PlasmaWave. The Levoit carries none and asks for more cartridges in return.
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