The catch
Coway Airmega 400
Max2 merges the main particle and carbon stages
Side by side
Coway Airmega 400 vs IQAir HealthPro Plus XE: IQAir’s quiet airflow should not be read as smoke CADR
Quick verdict
The Airmega 400 fits a decision based on particle CADR and gives you the lighter body. The HealthPro Plus XE makes sense when separately replaceable gas and particle cartridges justify its size and upkeep. IQAir's 27 dBA setting corresponds to only 40 CFM airflow, and raw airflow must not be labeled smoke CADR.
Before you buy
Why, and what it costs you
Far less air moves at the 27 dBA setting
IQAir's lowest figure, 27 dBA, goes with a 40 CFM airflow and is measured at 3.3 feet. In a 300-square-foot room with an 8-foot ceiling, 40 CFM of perfectly filtered air gives only one air change per hour. If the room needs more, move to a higher setting and expect the published sound level to go up. Coway's 328 smoke CADR is a different basis for sizing, one specific to particles. Neither set of figures shows which machine is quieter at equal clean-air delivery.
Where this comes from
Multiply 40 CFM by 60 and divide by 2,400 cubic feet to get one ideal air change per hour. Because IQAir airflow is not pollutant CADR, even that result only illustrates an upper bound on flow.
The catch
IQAir HealthPro Plus XE
Carrying the 35 lb body takes more effort
Coway Airmega 400
- Why pick it
- Room sizing rests on published pollutant CADR
- A 24.7 lb body beats a 35 lb unit for carrying
- The catch
- Max2 merges the main particle and carbon stages
The Airmega 400 photo shows Graphite, while the Amazon listing selects White. Its purchase link is paused while the exact finish is verified.
IQAir HealthPro Plus XE
- Why pick it
- Gas and principal particle stages can be replaced on their own
- The included casters let it roll across a suitable level floor
- The catch
- Carrying the 35 lb body takes more effort
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What this page compares
Quiet-speed airflow, particle CADR, carrying weight and separate filter replacements are compared for the Coway Airmega 400 and IQAir HealthPro Plus XE.
Separate certified particle delivery from raw airflow first. Then decide if having separate gas and particle cartridges is worth a larger, heavier system.
Which one fits
Pick the situations that sound like you
I need a published smoke CADR to run a room calculation
Coway lists 328 smoke CFM, while IQAir's six CFM values are raw airflow, so no equivalent smoke CADR is established to set against it.
- Coway Airmega 400
- Good
- IQAir HealthPro Plus XE
- Depends
I want five air changes in 300 sq ft on IQAir's 27 dBA setting
In the 2,400 cu ft example, IQAir's 27 dBA setting moves 40 CFM, which is at most one ideal air change. Coway's comparable quiet setting is unknown.
- Coway Airmega 400
- Depends
- IQAir HealthPro Plus XE
- Not suitable
I have to carry it between floors, so it must weigh under 30 lb
Coway comes in at 24.7 lb and IQAir at 35 lb. Casters ease rolling on a flat floor. They do not help you carry it on stairs.
- Coway Airmega 400
- Good
- IQAir HealthPro Plus XE
- Not suitable
I want to replace the gas cartridge and the main particle cartridge on their own
In the Coway Max2, those main stages are combined. IQAir documents V5-Cell and HyperHEPA as separate cartridges.
- Coway Airmega 400
- Not suitable
- IQAir HealthPro Plus XE
- Good
In practice
Differences you will notice
Far less air moves at the 27 dBA setting
IQAir's lowest figure, 27 dBA, goes with a 40 CFM airflow and is measured at 3.3 feet. In a 300-square-foot room with an 8-foot ceiling, 40 CFM of perfectly filtered air gives only one air change per hour. If the room needs more, move to a higher setting and expect the published sound level to go up. Coway's 328 smoke CADR is a different basis for sizing, one specific to particles. Neither set of figures shows which machine is quieter at equal clean-air delivery.
How we worked this out
Multiply 40 CFM by 60 and divide by 2,400 cubic feet to get one ideal air change per hour. Because IQAir airflow is not pollutant CADR, even that result only illustrates an upper bound on flow.
Separate cartridges help when a single filter ages first
IQAir splits its filtration into PreMax, gas-media V5-Cell and HyperHEPA cartridges. That helps a buyer who wants to swap stages independently instead of replacing Coway's combined Max2 principal filter. When particle cleaning and washable prefilter upkeep are the main jobs, Coway is the simpler candidate. It is also 10.3 lb lighter, at 24.7 lb against IQAir's 35 lb, though IQAir's included casters make rolling easier on a single level. Neither design establishes a verified winner for odor removal.
How we worked this out
35 minus 24.7 leaves 10.3 lb. How the replacements are structured changes what you buy at each service, but real replacement cost and life depend on the media, exposure and current prices.
A similar floor footprint can conceal a heavier carry
IQAir's 15-by-16-inch footprint is just about 10 percent larger than Coway's 14.8-inch square, yet its 35 lb body is about 42 percent heavier. Casters are included, so IQAir can work if the purifier stays on a single level. If you will be moving it upstairs often, start with Coway, which weighs less. Look at the handles, the route and your own lifting limits, since neither percentage tells you how comfortable it is to carry.
How we worked this out
The footprints come to 240 and 219.04 square inches. The weight increase is 10.3 divided by 24.7, or about 41.7 percent. None of this counts ventilation space or accessories.
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.
Coway Airmega 400
Works with your numbers328 CFM of verified clean-air delivery works out to about 8.2 air changes per hour in this room. Hitting the 5 ACH target takes 200 CFM.
IQAir HealthPro Plus XE
Check this one yourselfWe do not have a comparable verified smoke CADR for this exact model.
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
Coway, AP-2015F
Airmega 400
Wide and high in airflow, this purifier has dual filters, two washable prefilters and straightforward automatic controls, with no app involved.
- Best for
- Room sizing rests on published pollutant CADR
Facts we checked
- Air-delivery basis: Published CADR is 328 smoke, 328 dust and 400 pollen CFM.
- Weight: The body weighs 24.7 lb.
- Footprint: The footprint is 14.8 inches square.
- Main filter replacement: The Max2 replacement combines the principal particle and activated-carbon filtration stages.
The Airmega 400 photo shows Graphite, while the Amazon listing selects White. Its purchase link is paused while the exact finish is verified.
Option B
IQAir, HPPXE / 123.AB.11.02
HealthPro Plus XE
Built for both particles and gases, it combines a large HyperHEPA stage, five pounds of carbon-alumina media and the current XE sensing.
- Best for
- Gas and principal particle stages can be replaced on their own
Facts we checked
- Air-delivery basis: The six airflow settings are 40, 75, 130, 170, 200 and 300 CFM. These are airflow values rather than pollutant CADR.
- Weight: The unit weighs 35 lb and includes casters.
- Footprint: The footprint is 15 by 16 inches.
- Main filter replacement: PreMax, V5-Cell gas filtration and HyperHEPA are separate replacement cartridges.
Spec by spec
Where they really differ
| Spec | Coway Airmega 400 | IQAir HealthPro Plus XE | In practice |
|---|---|---|---|
| Air-delivery basis | Published CADR is 328 smoke, 328 dust and 400 pollen CFM. | The six airflow settings are 40, 75, 130, 170, 200 and 300 CFM. These are airflow values rather than pollutant CADR. | IQAir's airflow figure doesn't measure the same thing as a pollutant CADR. |
| Weight | The body weighs 24.7 lb. | The unit weighs 35 lb and includes casters. | Casters make rolling easier, but you still carry the full weight on stairs. |
| Footprint | The footprint is 14.8 inches square. | The footprint is 15 by 16 inches. | Leave room around either unit for airflow and filter service. |
| Main filter replacement | The Max2 replacement combines the principal particle and activated-carbon filtration stages. | PreMax, V5-Cell gas filtration and HyperHEPA are separate replacement cartridges. | Replacing separate cartridges is a different routine from replacing combined stages. |
Trade-offs
What each pick costs you
With Coway Airmega 400
- No matched low-speed CADR and noise result is established
With IQAir HealthPro Plus XE
- At the 27 dBA setting, airflow is only 40 CFM
Change of plan
When the answer changes
Room sizing rests on published pollutant CADR
Go with Coway Airmega 400. The 24.7 lb body is easier to carry than a 35 lb unit. Max2 merges the main particle and carbon stages.
Gas and principal particle stages can be replaced on their own
Go with IQAir HealthPro Plus XE. Use the included casters to roll the unit across a suitable level floor. The 35 lb body is harder to carry.
Decision guide
How to decide
Pick the Airmega 400 for a particle-CADR-based decision and the lighter body, or the HealthPro Plus XE when separately replaceable gas and particle cartridges justify its size and upkeep. IQAir's 27 dBA setting corresponds to only 40 CFM airflow, and raw airflow must not be labeled smoke CADR.
Far less air moves at the 27 dBA setting
IQAir's lowest figure of 27 dBA is tied to 40 CFM airflow, measured at 3.3 feet. In a 300-square-foot room with an 8-foot ceiling, even perfectly filtered 40 CFM would give only one air change per hour. If the room target needs more, choose a higher setting and expect the published sound level to rise. Coway's 328 smoke CADR gives a different, particle-specific sizing basis. Neither figure can establish which machine is quieter at equal clean-air delivery. 40 CFM multiplied by 60 and divided by 2,400 cubic feet equals one ideal air change per hour. IQAir airflow is not pollutant CADR, so even that calculation only illustrates an upper bound on flow.
Separate cartridges help when a single filter ages first
IQAir splits its filtration into PreMax, gas-media V5-Cell and HyperHEPA cartridges. That helps if you want to replace different stages independently instead of swapping Coway's combined Max2 principal filter. Coway is the simpler candidate when particle cleaning and washable prefilter upkeep are the main jobs. Its 24.7 lb body is also 10.3 lb lighter than IQAir's 35 lb body, though IQAir's included casters help with rolling on one level. Neither layout establishes a verified odor-removal winner. 35 minus 24.7 equals 10.3 lb. Replacement architecture can change what you buy at a given service event, but actual replacement cost and life depend on media, exposure and current prices.
A similar floor footprint can conceal a heavier carry
Think about carrying first. IQAir’s 35 lb body is about 42 percent heavier than Coway’s, while its 15-by-16-inch footprint is only about 10 percent larger than Coway’s 14.8-inch square. If the purifier stays on one level, IQAir’s included casters may make it workable. If you expect to move it upstairs often, Coway’s lower mass is the better place to start. Neither ratio measures comfort, so check the handles, the route and your own lifting limits. The footprints are 240 and 219.04 square inches. The weight increase is 10.3 divided by 24.7, about 41.7 percent. Ventilation space and accessories are left out of these measurements.
What this page can’t tell you
- IQAir’s 300 CFM maximum airflow is not a smoke CADR, and the sizing examples support no claim of medical protection.
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 |
|---|---|---|---|
| Coway Airmega 400 |
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| IQAir HealthPro Plus XE |
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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.
Coway Airmega 400
Room sizing rests on published pollutant CADR
The Airmega 400 photo shows Graphite, while the Amazon listing selects White. Its purchase link is paused while the exact finish is verified.
IQAir HealthPro Plus XE
Gas and principal particle stages can be replaced on their own
See price & reviews on AmazonEach link opens in a new tab.
We may earn a commission from qualifying Amazon purchases. How we make money