Main trade-off
Coway Airmega 400
Max2 combines the principal particle and carbon stages
Head-to-head
Coway Airmega 400 vs IQAir HealthPro Plus XE: IQAir’s quiet airflow cannot be treated as smoke CADR
The short answer
Choose Airmega 400 for a particle-CADR-based decision and the lighter body. Choose 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.
Before you choose
The reasoning and the trade-offs
The 27 dBA setting moves far less air
IQAir ties its lowest 27 dBA figure 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 yield only one air change per hour. Choose a higher setting if the room target needs more, and expect the published sound level to rise. Coway's 328 smoke CADR supplies a different, particle-specific sizing basis. Those figures cannot establish which machine is quieter at equal clean-air delivery.
What this is based on
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 is an upper-bound flow illustration.
Main trade-off
IQAir HealthPro Plus XE
The 35 lb body is heavier to carry
Coway Airmega 400
- Choose it for
- Use published pollutant CADR for room sizing
- Carry a 24.7 lb body rather than a 35 lb unit
- Main trade-off
- Max2 combines the principal 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
- Choose it for
- Replace the gas and principal particle stages independently
- Roll the unit on its included casters on a suitable level floor
- Main trade-off
- The 35 lb body is heavier to carry
About this comparison
Compare Coway Airmega 400 and IQAir HealthPro Plus XE for quiet-speed airflow, particle CADR, carrying weight and separate filter replacements.
Distinguish certified particle delivery from raw airflow, then decide whether separate gas and particle cartridges justify a larger, heavier system.
Winner by situation
Start with what you need it to do
I need published smoke CADR for a room calculation
Coway lists 328 smoke CFM. IQAir's six CFM values are raw airflow, so an equivalent smoke CADR is not established.
- Coway Airmega 400
- Good
- IQAir HealthPro Plus XE
- Depends
I want five air changes in 300 sq ft at IQAir's 27 dBA setting
IQAir's 27 dBA setting moves 40 CFM, giving at most one ideal air change in the 2,400 cu ft example. Coway's equivalent quiet setting is unknown.
- Coway Airmega 400
- Depends
- IQAir HealthPro Plus XE
- Not suitable
I need a unit below 30 lb for carrying between floors
Coway is 24.7 lb. IQAir is 35 lb. Casters assist same-level rolling, not stair carrying.
- Coway Airmega 400
- Good
- IQAir HealthPro Plus XE
- Not suitable
I want the gas and principal particle cartridges replaced separately
Coway Max2 combines those principal stages. IQAir documents separate V5-Cell and HyperHEPA cartridges.
- Coway Airmega 400
- Not suitable
- IQAir HealthPro Plus XE
- Good
What matters in practice
The differences that matter
The 27 dBA setting moves far less air
IQAir ties its lowest 27 dBA figure 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 yield only one air change per hour. Choose a higher setting if the room target needs more, and expect the published sound level to rise. Coway's 328 smoke CADR supplies a different, particle-specific sizing basis. Those figures cannot establish which machine is quieter at equal clean-air delivery.
How we reached this conclusion
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 is an upper-bound flow illustration.
Separate cartridges matter when one filter ages first
IQAir separates its PreMax, gas-media V5-Cell and HyperHEPA cartridges. That is useful if the buyer wants to replace different stages independently rather than replace 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, although IQAir's included casters help rolling on one level. Neither layout establishes a verified odor-removal winner.
How we reached this conclusion
35 minus 24.7 equals 10.3 lb. Replacement architecture can change what is purchased at one service event, but actual replacement cost and life depend on media, exposure and current prices.
A similar floor footprint can hide a larger carrying burden
IQAir's 15-by-16-inch footprint is only about 10 percent larger than Coway's 14.8-inch square, but its 35 lb body is about 42 percent heavier. If the purifier stays on one level, included casters may make IQAir's format workable. For frequent upstairs moves, Coway's lower mass is the clearer starting point. Check handles, route and your own lifting limits because neither ratio measures comfort.
How we reached this conclusion
Footprints are 240 and 219.04 square inches. Weight increase is 10.3 divided by 24.7, about 41.7 percent. Measurements exclude ventilation space and accessories.
Try your real numbers
Will either purifier move enough clean air?
The result checks hard limits only. Preferences stay out of the calculation.
Coway Airmega 400
Fits these inputs328 CFM of verified clean-air delivery gives about 8.2 air changes per hour here. The 5 ACH target needs 200 CFM.
IQAir HealthPro Plus XE
Needs a manual checkNo comparable verified smoke CADR is stored for this exact model.
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
Coway, AP-2015F
Airmega 400
A wide, high-airflow purifier with dual filters, two washable prefilters and simple automatic controls without an app.
- Best matched use
- Use published pollutant CADR for room sizing
Checked facts
- 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.
Choice B
IQAir, HPPXE / 123.AB.11.02
HealthPro Plus XE
A serious particle-and-gas machine with a large HyperHEPA stage, five pounds of carbon-alumina media and current XE sensing.
- Best matched use
- Replace the gas and principal particle stages independently
Checked facts
- 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.
Meaningful differences
What changes the fit
| What changes | Coway Airmega 400 | IQAir HealthPro Plus XE | Why it matters |
|---|---|---|---|
| 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 airflow is not an equivalent pollutant-CADR measurement. |
| Weight | The body weighs 24.7 lb. | The unit weighs 35 lb and includes casters. | Casters help rolling but do not remove the weight for stair carrying. |
| Footprint | The footprint is 14.8 inches square. | The footprint is 15 by 16 inches. | Allow airflow and filter-service space around either body. |
| 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. | Separate cartridges and combined stages create different replacement routines. |
What you give up
Every choice has a cost
If you choose Coway Airmega 400
- A matched low-speed CADR-and-noise result is not established
If you choose IQAir HealthPro Plus XE
- The 27 dBA setting is only 40 CFM airflow
Recommendation switch
The decision flips if...
Use published pollutant CADR for room sizing
Choose Coway Airmega 400. Carry a 24.7 lb body rather than a 35 lb unit. Max2 combines the principal particle and carbon stages.
Replace the gas and principal particle stages independently
Choose IQAir HealthPro Plus XE. Roll the unit on its included casters on a suitable level floor. The 35 lb body is heavier to carry.
What matters in practice
Before you choose
What this comparison cannot tell you
- Do not label IQAir's 300 CFM maximum airflow as smoke CADR or claim medical protection from these sizing examples.
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 |
|---|---|---|---|
| Coway Airmega 400 |
|
| |
| IQAir HealthPro Plus XE |
|
|
|
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.
Coway Airmega 400
Use published pollutant CADR for room sizing
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
Replace the gas and principal particle stages independently
See price & reviews on AmazonLinks open in a new tab.