Main trade-off
Levoit Core 400S-P
The combined filter cannot be washed.
Head-to-head
Levoit Core 400S-P vs Coway Airmega 300: Coway’s larger room label uses fewer air changes per hour
The short answer
Choose Core 400S-P for app schedules and a compact, lighter cabinet in a room within its 358 sq ft rating at 4.8 ACH. Choose Airmega 300 for separate washable prefilters and local controls. Its 628 sq ft rating uses 4 ACH, so check the airflow target before treating the larger number as a direct comparison.
Before you choose
The reasoning and the trade-offs
The room labels describe different workloads
Coway's 628 sq ft at 4 ACH converts proportionally to about 523 sq ft at 4.8 ACH. A 500 sq ft room makes Coway worth checking, while it exceeds Levoit's stated 358 sq ft limit.
What this is based on
628 × 4 ÷ 4.8 = 523.3 sq ft, holding the assumptions behind Coway's label constant. This explains that label and is not a new certified room rating.
Main trade-off
Coway Airmega 300
No app or recurring scheduler on this exact 300 model.
Levoit Core 400S-P
- Choose it for
- Set recurring schedules and control the purifier through VeSync
- Fit a 10.8-inch-wide cabinet and carry an 11 lb unit
- Main trade-off
- The combined filter cannot be washed.
Coway Airmega 300
- Choose it for
- Wash separate prefilters instead of dry-cleaning an integrated outer layer
- Consider the larger room label after accounting for its lower 4 ACH basis
- Main trade-off
- No app or recurring scheduler on this exact 300 model.
About this comparison
Compare Core 400S-P and Airmega 300 for room-size assumptions, app scheduling, washable prefilters and the cabinet space needed beside furniture.
Choose Core 400S-P for app schedules and a compact, lighter cabinet in a room within its 358 sq ft rating at 4.8 ACH. Choose Airmega 300 for separate washable prefilters and local controls. Its 628 sq ft rating uses 4 ACH, so check the airflow target before treating the larger number as a direct comparison.
Winner by situation
Start with what you need it to do
Remote start and recurring schedules are essential
Core 400S-P supports VeSync schedules. The exact Airmega 300 has no app or scheduler.
- Levoit Core 400S-P
- Good
- Coway Airmega 300
- Not suitable
The cabinet must be under 12 inches wide
Levoit is 10.8 inches wide and Coway is 13.6. This only checks the cabinet width, so leave separate ventilation clearance.
- Levoit Core 400S-P
- Good
- Coway Airmega 300
- Not suitable
Separate washable prefilters are essential
Levoit's combined filter must not be washed. Coway supplies separate washable prefilters.
- Levoit Core 400S-P
- Not suitable
- Coway Airmega 300
- Good
A 500 sq ft room targeting approximately 4.8 ACH
500 exceeds Levoit's 358 sq ft rating. Coway's 4 ACH label converts to about 523 sq ft, but confirm the actual pollutant CADR, ceiling height and usable fan setting.
- Levoit Core 400S-P
- Not suitable
- Coway Airmega 300
- Depends
A 300 sq ft room using local automatic controls
Both have local Auto controls and published room labels that accommodate this area at their stated assumptions. The chosen fan speed still affects airflow.
- Levoit Core 400S-P
- Good
- Coway Airmega 300
- Good
Both app schedules and washable separate prefilters are mandatory
Each misses one required feature. Changing models is more useful than relaxing an essential requirement.
- Levoit Core 400S-P
- Not suitable
- Coway Airmega 300
- Not suitable
What matters in practice
The differences that matter
The room labels describe different workloads
Coway's 628 sq ft at 4 ACH converts proportionally to about 523 sq ft at 4.8 ACH. A 500 sq ft room makes Coway worth checking, while it exceeds Levoit's stated 358 sq ft limit.
How we reached this conclusion
628 × 4 ÷ 4.8 = 523.3 sq ft, holding the assumptions behind Coway's label constant. This explains that label and is not a new certified room rating.
Core 400S-P needs substantially less cabinet area
Its shell occupies about 37% less floor area and is 10.4 lb lighter. That matters when the purifier must move between rooms, although the required airflow and intake clearance still come first.
How we reached this conclusion
10.8 × 10.8 = 116.64 sq in. 13.6 × 13.6 = 184.96 sq in. The reduction is 36.9%. 21.4 - 11 = 10.4 lb.
The maintenance preference changes which controls you get
A buyer requiring both washable separate prefilters and remote schedules cannot satisfy both with this pair. Core 400S-P supplies the connected controls, while this Airmega 300 supplies the washable prefilters.
How we reached this conclusion
Levoit documents VeSync schedules and dry cleaning of its combined filter. Coway specifies washable prefilters but Mobile App No and Scheduler No. Airmega 300S is a different model.
Try your real numbers
Will either purifier move enough clean air?
The result checks hard limits only. Preferences stay out of the calculation.
Levoit Core 400S-P
Fits these inputs231 CFM of verified clean-air delivery gives about 5.8 air changes per hour here. The 5 ACH target needs 200 CFM.
Coway Airmega 300
Fits these inputs285 CFM of verified clean-air delivery gives about 7.1 air changes per hour here. The 5 ACH target needs 200 CFM.
This uses maximum-speed, pollutant-specific CADR and a five-air-changes-per-hour target. Quieter settings deliver less clean air. It does not substitute raw airflow or a one-change coverage claim.
Choice A
Levoit, LAP-C401S-WUS
Core 400S-P
A compact, responsive smart purifier with enough airflow for a medium room and one of the category’s better app experiences.
- Best matched use
- Set recurring schedules and control the purifier through VeSync
Checked facts
- Published room rating: 358 sq ft at 4.8 ACH
- Published CADR basis: 231 CFM generic CADR
- Remote scheduling: VeSync app and schedules
- Cabinet base: 10.8 × 10.8 in
Choice B
Coway, AP-1515H
Airmega 300
A two-sided purifier for a living room with washable prefilters, automatic fan control and no app setup.
- Best matched use
- Wash separate prefilters instead of dry-cleaning an integrated outer layer
Checked facts
- Published room rating: 628 sq ft at 4 ACH
- Published CADR basis: 285 smoke, 306 dust, 339 pollen CFM
- Remote scheduling: No app or scheduler on the 300
- Cabinet base: 13.6 × 13.6 in
Meaningful differences
What changes the fit
| What changes | Levoit Core 400S-P | Coway Airmega 300 | Why it matters |
|---|---|---|---|
| Published room rating | 358 sq ft at 4.8 ACH | 628 sq ft at 4 ACH | The areas use different circulation rates. Do not compare the two numbers alone. |
| Published CADR basis | 231 CFM generic CADR | 285 smoke, 306 dust, 339 pollen CFM | The generic Levoit figure is not silently relabeled as a pollutant-specific test. |
| Remote scheduling | VeSync app and schedules | No app or scheduler on the 300 | A local countdown timer is different from a recurring app schedule. |
| Cabinet base | 10.8 × 10.8 in | 13.6 × 13.6 in | Intake clearance is additional to the plastic cabinet dimensions. |
| Published weight | 11 lb | 21.4 lb | Grip, stairs and carrying distance also affect practical handling. |
| Prefilter maintenance | Brush or vacuum the outer prefilter, do not wash the combined filter | Separate washable prefilters and replaceable Max2 filters | Neither arrangement eliminates main-filter replacement. |
What you give up
Every choice has a cost
If you choose Levoit Core 400S-P
- Its 358 sq ft label at 4.8 ACH can rule out a larger room.
If you choose Coway Airmega 300
- The 21.4 lb cabinet needs more floor space and side access.
Recommendation switch
The decision flips if...
Remote schedules are required
Choose Levoit Core 400S-P. Only Core 400S-P has connected scheduling in this exact pair.
Separate washable prefilters are required
Choose Coway Airmega 300. The Airmega 300 documents this maintenance arrangement.
What matters in practice
How to make the call
Start with the actual room
Measure the enclosed area and ceiling height, including an open adjoining space where appropriate. The two room labels use different air-change rates. The proportional conversion helps explain the difference, while the fit calculator uses pollutant-specific CADR, your ceiling height and a 5 ACH target. Those are separately labeled methods, not interchangeable certification results.
Decide whether the purifier will move
Core 400S-P takes less cabinet space and weighs 11 lb. Airmega 300 is more likely to stay in one place at 21.4 lb. Before choosing the smaller body for a tight corner, check intake clearance. A shell that fits against furniture can still have restricted airflow.
Choose a maintenance routine you will follow
Coway lets you remove and wash its prefilters, with separate indicators for washing and filter replacement. Levoit's outer prefilter needs a brush or vacuum. Price the correct replacement filter or set for each model. Neither routine supports a promise of lower lifetime cost without actual filter prices, usage and replacement intervals.
What this comparison cannot tell you
- The 523 sq ft figure is a proportional explanation of Coway's room label, not a replacement manufacturer certification or a calculator result.
- No matched-noise airflow, electricity-use, cleaning or health-outcome testing was performed. Published maximum capacity is not promised in Sleep or every Auto setting.
What the facts say
What the comparison shows
Useful conclusions from the current air purifiers comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Levoit Core 400S-P |
|
| |
| Coway Airmega 300 |
|
|
Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Levoit Core 400S-P
Set recurring schedules and control the purifier through VeSync
See price & reviews on AmazonCoway Airmega 300
Wash separate prefilters instead of dry-cleaning an integrated outer layer
See price & reviews on AmazonLinks open in a new tab.