Coway Airmega 400S vs Medify MA-40
Side-by-side comparison of features, pricing, ratings, and alternatives.
The Coway Airmega 400S is a smart HEPA air purifier designed for large rooms. It features real-time air quality sensing and advanced filtration technology to capture 99.97% of particles as small as 0.3 microns. With its sleek and modern design, it is perfect for living rooms, bedrooms, and offices. The Airmega 400S is also Wi-Fi enabled, allowing users to monitor and control the air quality remotely through the Coway IoCare app.
The Medify MA-40 is a tower air purifier built around an H13 HEPA filter, a tighter grade than the H11 media used in many budget units, paired with a carbon layer for odors and a mesh pre-filter for hair and large debris. It is designed around airflow: the unit moves a lot of air for its size, which is how it covers medium to large rooms without a floor-standing chassis. Controls are a simple touch panel on the top of the unit with fan speed, a timer, a child lock and a filter-replacement indicator. The front is a tempered glass panel, which makes it look less like an appliance than most purifiers in its price range. There is no air-quality sensor or true auto mode on the base model, so fan speed is set manually rather than driven by measured particulate levels.
- Advanced HEPA filter captures 99.97% of particles as small as 0.3 microns
- Real-time air quality sensing and monitoring
- Wi-Fi enabled for remote control and scheduling
- Quiet operation with a noise level of 22-52 dB
- H13-grade HEPA at a price where H11 is more common
- Strong airflow for the footprint, so it clears medium and large rooms quickly
- Child lock and filter-change indicator are genuinely useful and often omitted at this price
- Glass front panel looks better than typical plastic purifier housings
- Filter replacement can be expensive
- Limited coverage area compared to some other models
- No built-in ionizer or UV light
- No air-quality sensor or true auto mode on the base model, so speed is set by hand
- Noticeably loud on the top fan speed
- Carbon layer is thin compared to dedicated carbon purifiers, so heavy odor loads outrun it
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Alternatives to Coway Airmega 400S
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All-steel HEPA and carbon air cleaner built for large rooms and heavy filtration loads.
Advanced PECO filtration eliminates viruses, allergens, and odors in real time
Alternatives to Medify MA-40
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Large-room smart HEPA purifier with swappable filter types for specific air problems.
HEPASilent purifier for large rooms with auto mode and washable pre‑filters.
The Verdict
AI-generated from listing dataThe Medify MA-40 offers strong airflow and H13 HEPA at a lower price but lacks smart features, while the Coway Airmega 400S provides Wi‑Fi control, auto‑mode, and larger coverage at a higher cost.
Key differences
- •HEPA grade: Medify uses H13 (higher than typical H11), Coway uses standard 99.97% HEPA (grade not specified).
- •Smart connectivity: Medify has none; Coway includes Wi‑Fi and app‑based air‑quality monitoring.
- •Coverage area: Medify is aimed at medium rooms; Coway covers up to 1560 sq ft, suitable for large spaces.
- •Noise: Medify is noticeably loud on high speed; Coway operates quietly 22‑52 dB.
- •Price & warranty: Medify price not listed (implied lower); Coway MSRP $549 with a 5‑year warranty.
Pricing & value
Medify’s price is not listed but is positioned as lower‑cost than typical H13 units; Coway costs $549.
Coverage / Capacity
Coway specifies coverage up to 1560 sq ft; Medify is described for medium to large bedrooms only.
Energy efficiency & running cost
Coway is Energy Star certified; Medify’s energy rating not specified.
Noise level
Coway operates at 22‑52 dB; Medify is “noticeably loud” on top speed.
Size & footprint
Medify is a tower unit with a smaller footprint; Coway dimensions are 14.8×14.8×22.8 in.
Features (smart, auto, sensors)
Coway includes Wi‑Fi, app monitoring, auto fan speed; Medify has no sensors or auto mode.
Ease of maintenance
Both provide filter‑change indicators; carbon layer thickness differs but not directly comparable.
Warranty
Coway offers a 5‑year limited warranty; Medify warranty not specified.
Choose Coway Airmega 400S if…
Buyers with large rooms, want Wi‑Fi/app control, auto‑mode, and are willing to pay more for those features.
Choose Medify MA-40 if…
Buyers who need strong airflow for a medium bedroom, prefer a lower upfront cost, and don’t need smart controls.
Common questions
Which unit is cheaper to buy?
Medify’s price isn’t listed but is marketed as lower‑cost than typical H13 purifiers; Coway costs $549.
Can I control the purifier from my phone?
Only the Coway Airmega 400S offers Wi‑Fi and app control; Medify has no smart connectivity.
Will either unit handle strong odors?
Both have carbon layers, but Medify’s carbon is described as thin and may be outpaced by heavy odor loads; Coway’s carbon capacity isn’t detailed.