The catch
Levoit Core 600S-P
Even with strong tested particle performance, RTINGS does not classify the current filter as formally HEPA-certified.
Side by side
Levoit Core 600S vs Core 400S: 600S brings airflow, 400S saves floor space and top-speed noise
Quick verdict
For a larger bedroom, a living room or smoke season, get the Core 600S-P. If the room is smaller and the 10.8-inch base and lower top-speed sound count for more than extra airflow, get the Core 400S-P.
Before you buy
Why, and what it costs you
Smoke CADR: how big the gap is
The published “Smoke CADR” figure is 69% higher on Levoit Core 600S-P: 391 CFM, against 231 CFM on Levoit Core 400S-P.
Where this comes from
For smoke cadr, extra published output only helps when your room, surface or workload needs the headroom. On its own, it does not prove better results. The percentage is worked out from the lower published figure.
The catch
Levoit Core 400S-P
The current filter is not classed as HEPA-certified by RTINGS.
Levoit Core 600S-P
- Why pick it
- Smoke in your room calls for more than 231 CFM.
- You'd like spare capacity instead of running flat out.
- The catch
- Even with strong tested particle performance, RTINGS does not classify the current filter as formally HEPA-certified.
The Amazon listing mixes US and European Core 600S-P model identifiers. Its purchase link is paused while the exact US model, voltage and package are verified.
Levoit Core 400S-P
- Why pick it
- Your room-size target is already met by its verified airflow.
- The smaller round base is simpler to fit in.
- The catch
- The current filter is not classed as HEPA-certified by RTINGS.
We may earn a commission from qualifying Amazon purchases. How we make money
What this page compares
The current U.S. Core 600S-P and Core 400S-P are weighed here by verified pollutant CADR, room volume, size, sound and ownership.
This one comes down to smoke cadr and dust cadr first, then to the limits of your own setup.
Day to day
How each one fits your routine
Don't size Auto in a dark room from the maximum of the Core 600S
With Auto active in a dark room, the light-sensor routine on the Core 600S stays away from high and turbo speeds. That can make nights more comfortable, but it gives up its full rated particle delivery. Choose between these models based on the speed you will allow overnight. The evidence reviewed for the Core 400S also has no matched sleep-speed CADR, so its lower minimum sound does not settle the question.
Where this comes from
An explicit operating limit for the Core 600S is added to the maximum-CADR comparison here. Neither exact model comes with a measured low-speed delivery curve, so any winner for a quiet night stays conditional.
A high ceiling can put a room out of the smaller model's reach
For a five-air-change planning target, a 300-square-foot room with a ten-foot ceiling needs 250 CFM. The 231 smoke CADR of the Core 400S falls short of that, while the 391 of the Core 600S clears it at rated conditions. Choose 600S if that room and target are fixed. Drop the ceiling to eight feet and the same floor area needs only 200 CFM, which puts both back on the nominal shortlist.
Where this comes from
Area times ceiling height times five, divided by 60, gives 250 or 200 CFM. The calculation uses smoke particles at rated speed and promises nothing about mixing, exposure or sleep-mode delivery.
Which one fits
Pick the situations that sound like you
Wildfire smoke makes its way inside
Levoit Core 600S-P lists “606 square feet” for suggested room at 4.8 ach, while Levoit Core 400S-P lists “358 square feet”. Use this published coverage as a sizing limit under the stated conditions. It is not a guarantee for every layout.
- Levoit Core 600S-P
- Better fit
- Levoit Core 400S-P
- Good
I want it in my bedroom
The room fit, low setting and lights-off controls make it suitable to run overnight.
- Levoit Core 600S-P
- Depends
- Levoit Core 400S-P
- Better fit
It will be cleaning an open living area
For a larger connected space, its high verified airflow makes it a credible place to start.
- Levoit Core 600S-P
- Better fit
- Levoit Core 400S-P
- Depends
My ceilings run higher than normal
Extra ceiling height raises the room volume, and its verified airflow leaves more headroom to handle that.
- Levoit Core 600S-P
- Better fit
- Levoit Core 400S-P
- Depends
I need the air cleaned up fast
Levoit Core 600S-P lists “391 CFM” for smoke cadr, while Levoit Core 400S-P lists “231 CFM”. For smoke cadr, extra published output only helps when your room, surface or workload needs the headroom. On its own, it does not prove better results.
- Levoit Core 600S-P
- Better fit
- Levoit Core 400S-P
- Depends
I'm setting it up in a nursery
Levoit Core 600S-P lists “26 to 55 dB” for published sound range, while Levoit Core 400S-P lists “24 to 52 dB”. This counts most in bedrooms, shared spaces and long sessions.
- Levoit Core 600S-P
- Depends
- Levoit Core 400S-P
- Better fit
In practice
Differences you will notice
Smoke CADR: how big the gap is
The published “Smoke CADR” figure is 69% higher on Levoit Core 600S-P: 391 CFM, against 231 CFM on Levoit Core 400S-P.
How we worked this out
For smoke cadr, extra published output only helps when your room, surface or workload needs the headroom. On its own, it does not prove better results. The percentage is worked out from the lower published figure.
Plug in your numbers
Can either purifier keep up with your room?
This checks hard limits only. Personal preferences are left out of the math.
Levoit Core 600S-P
Works with your numbers391 CFM of verified clean-air delivery works out to about 9.8 air changes per hour in this room. Hitting the 5 ACH target takes 200 CFM.
Levoit Core 400S-P
Works with your numbers231 CFM of verified clean-air delivery works out to about 5.8 air changes per hour in this room. Hitting the 5 ACH target takes 200 CFM.
This uses each model’s pollutant-specific CADR at top speed and a target of five air changes per hour. Quieter settings clean less air. Raw airflow and one-change coverage claims are never swapped in.
Option A
Levoit, LAP-C601S-WUS
Core 600S-P
This cylindrical smart purifier moves enough air for a large room while taking up little floor space, and its VeSync controls are polished.
- Best for
- Smoke in your room calls for more than 231 CFM.
Facts we checked
- Smoke CADR: 391 CFM
- Dust CADR: 398 CFM
- Pollen CADR: 436 CFM
- Suggested room at 4.8 ACH: 606 square feet
The Amazon listing mixes US and European Core 600S-P model identifiers. Its purchase link is paused while the exact US model, voltage and package are verified.
Option B
Levoit, LAP-C401S-WUS
Core 400S-P
Small and responsive, this smart purifier moves enough air for a medium room and has one of the better apps in the category.
- Best for
- Your room-size target is already met by its verified airflow.
Facts we checked
- Smoke CADR: 231 CFM
- Dust CADR: 240 CFM
- Pollen CADR: 259 CFM
- Suggested room at 4.8 ACH: 358 square feet
Spec by spec
Where they really differ
| Spec | Levoit Core 600S-P | Levoit Core 400S-P | In practice |
|---|---|---|---|
| Smoke CADR | 391 CFM | 231 CFM | For smoke cadr, extra published output only helps when your room, surface or workload needs the headroom. On its own, it does not prove better results. |
| Dust CADR | 398 CFM | 240 CFM | For dust cadr, extra published output only helps when your room, surface or workload needs the headroom. On its own, it does not prove better results. |
| Pollen CADR | 436 CFM | 259 CFM | For pollen cadr, extra published output only helps when your room, surface or workload needs the headroom. On its own, it does not prove better results. |
| Suggested room at 4.8 ACH | 606 square feet | 358 square feet | Treat this published coverage as a sizing limit under the stated conditions. It does not guarantee results in every layout. |
| Published sound range | 26 to 55 dB | 24 to 52 dB | Bedrooms, shared spaces and long sessions are where it counts most. |
Trade-offs
What each pick costs you
With Levoit Core 600S-P
- The small carbon layer isn't designed to cope with heavy VOC exposure.
With Levoit Core 400S-P
- Its carbon section targets light household smells and isn't intended for high gas loads.
Decision guide
How to decide
Go with the smaller model only if its pollutant-specific CADR still meets the room target.
The gap is bigger than the cabinet size implies
The Core 600S carries 69 percent more certified smoke CADR than the Core 400S. Take a 450-square-foot room with an 8-foot ceiling: only the 600S clears the five-air-change target for smoke.
In a smaller room, the 400S is no weaker a choice
If you need 200 CFM, airflow left unused doesn't benefit you much. The 400S offers the same VeSync approach in a smaller body.
What this page can’t tell you
- Reasonably good mixing of the room air is assumed by the calculation
- No airflow figure is published for quiet mode
By the numbers
What the data shows
What we found across the air purifiers we compare, plus the checked facts behind each finding.
Show the facts and the math
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Levoit Core 600S-P |
|
|
|
| Levoit Core 400S-P |
|
|
Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
Levoit Core 600S-P
Smoke in your room calls for more than 231 CFM.
The Amazon listing mixes US and European Core 600S-P model identifiers. Its purchase link is paused while the exact US model, voltage and package are verified.
Levoit Core 400S-P
Your room-size target is already met by its verified airflow.
See price & reviews on AmazonEach link opens in a new tab.
We may earn a commission from qualifying Amazon purchases. How we make money