Air Purifiers · Product analysis
Medify MA-40
The Medify MA-40 is a $290 air purifier built around filter grade rather than features: H14-grade True HEPA plus a UV lamp, with a timer and a child lock for controls. It is aimed at allergy and asthma households that care more about what the media captures than about apps and sensors. The number that decides it is throughput. At roughly 224 CADR and 420 sq ft of AHAM-class coverage, it moves less clean air than purifiers costing $70 to $120 less, and it does so at a 31 dB noise floor with no auto mode. That is why the engine scores it 5 out of 10 overall. The filter grade is real. The price around it is hard to defend.
Medify
MA-40
H13/H14-grade filtration with UV at mid price
Typical price
$290
Worth considering
- Clean air could be better (5/10) — 224 CADR
- Quiet could be better (5/10) — 31 dB
Habilytics Score
224 CADR over 420 sq ft AHAM class - mid-pack throughput at a premium $290 price.
31 dB floor - only the Honeywell HPA300 and GermGuardian AC4825E run louder here.
No app, no sensor, no auto mode - UV, timer and child lock only.
Key specs
| Smoke CADR | 224 CFM |
| AHAM room size | 420 sq ft |
| Noise floor | 31 dB |
| Power draw | 60 W |
| Features | UV + timer + child lock |
| Street price | $290 |
| Typical price | $290 |
Prices are typical US street prices (approximate) and move often — check Amazon for the live price.
What 224 CADR actually covers
The MA-40's headline coverage figure is 1,793 sq ft. That is the 1-ACH number - the floor area the unit can turn over once per hour - and it is not how you size a purifier for allergies. The AHAM-class figure is 420 sq ft, and the CADR behind it is roughly 224. Plan around 420 sq ft, and around half that if you want the air changed several times an hour in a room where someone reacts to pollen or dander. Against the rest of the catalog, 224 CADR is mid-pack and the price is not. The Coway AP-1512HH Mighty rates 233 CADR at $170. The Levoit Core 400S rates 256 at $220. The Honeywell HPA300 rates 300 at $250. The Winix 9800 rates 300 over 500 sq ft at $300, ten dollars more than the Medify. In a class where CADR per dollar is the clearest signal a spec sheet gives, the MA-40 loses that comparison to four other units, three of them cheaper. Clean air scores 5 out of 10 for exactly that reason: the throughput is adequate for a mid-size room, but the price paid for it is not competitive.
H14-grade media and UV: the real argument
The reason to buy an MA-40 is printed on the filter, not the control panel. The Amazon listing states H14-grade True HEPA plus a UV lamp, and that is the highest filter grade stated by any unit in this catalog. For a household where someone has asthma or a diagnosed allergy, media grade is a defensible thing to prioritize, since it describes how much of the hardest-to-catch particle size the media holds on a single pass. Two caveats keep this from being a blank check. First, filter grade does not raise CADR. The 224 figure is what AHAM measures coming out of the machine, and finer media does not add clean air - a high-grade filter on a mid-throughput fan still only cleans the air the fan moves. Second, the UV lamp is an included feature, not a rated capability: nothing in the published specs quantifies what it contributes, so treat it as a bonus rather than as a reason to pay more. The honest framing is narrow but real. Buy this unit for its media if media grade is genuinely your priority, and accept that you are paying for grade rather than volume.
31 dB, one fixed speed, no sensor
The MA-40's low-speed noise floor is 31 dB. Only the Honeywell HPA300 at 32 dB and the GermGuardian AC4825E at 40 dB run louder in this catalog. The units it competes with sit several decibels lower: the Coway AP-1512HH and the Levoit Core 400S at 24 dB, the Winix 9800 at 26 dB, the Blueair 411i Max at 18 dB. Decibels are logarithmic, so the 7 dB gap between the Medify and a 24 dB unit is an audible difference in a quiet bedroom at night, not a rounding error. That is a large part of why quiet scores 5. The second daily-use cost is control. There is no PM sensor and no auto mode, so the unit cannot step up when someone cooks or vacuums and step back down afterward. You pick a fan speed and it holds it, which in practice means either running low all day and getting less than the rated 224 CADR, or running high and hearing it. One point does go the other way: rated power is 60 W, below the Coway's 77 W and well under the Honeywell HPA300's 130 W.
Why it scores 5, and what beats it
Five out of ten is not a recommendation. The engine reads three dimensions and the MA-40 lands mid-scale on all three - clean air 5, quiet 5, smart 5 - so there is no dimension where it leads, and it still costs $290. Two units in this catalog make that uncomfortable. The Coway AP-1512HH Mighty is $170, a full $120 less, and rates 233 CADR, a 24 dB floor, and an air-quality sensor with auto and eco modes. It scores 7. The Winix 9800 is $300, ten dollars more, and rates 300 CADR over 500 sq ft at 26 dB with Wi-Fi, a sensor and auto mode. It scores 7.7. If your priority is throughput, quiet, or automation, one of those two is the better purchase, and the cheaper one is often the right call. The MA-40 wins that comparison on exactly one criterion neither of them competes on: stated filter grade. That is a narrow reason to spend $290, and it is worth saying plainly that it is the only reason the engine can see.
When the MA-40 is still the right buy
A 5 is a middling score, not a disqualification, and there are households where this is still the correct pick. The clearest is a home with young children: the MA-40 is the only purifier in this catalog whose stated features include a child lock, and a control panel a toddler cannot change is worth something real. The second is a buyer who does not want connected hardware at all. No app means no account, no firmware, and nothing new on the home network, and most of the units that outscore it here list an app among their features. The third is the allergy household that has decided filter grade is the priority and has a room at or under about 420 sq ft to put it in. If you are in one of those three situations, buy near the low end of the $250 to $330 street range and set expectations correctly: 224 CADR, one fan speed you choose yourself, and a 31 dB floor you will hear at night. If you are not in one of them, the Coway at $170 does more of the job for less money.
Who it's for / who it's not
Who it's for
- Allergy or asthma homes that want H14-grade media and will pay for filter grade over features
- Households with young kids - this is the only unit here that lists a child lock
- Buyers who actively do not want an app, an account, or a sensor in the loop
- Rooms at or under about 420 sq ft where one fixed fan speed running all day is fine
Who it's not for
- Bedrooms and light sleepers: the 31 dB floor is the third-loudest in this catalog
- Value shoppers - the Coway AP-1512HH rates more CADR at $120 less and scores 7
- Anyone who wants auto mode, a PM sensor, or app control, since the MA-40 has none
Alternatives in our catalog
Coway AP-1512HH Mighty — $170
Take the Coway if price matters more than filter grade: $120 less, 233 CADR, a 24 dB floor, and a sensor with auto and eco modes. It scores 7.
Head-to-head comparisonWinix 9800 — $300
Take the Winix 9800 for ten dollars more: 300 CADR over 500 sq ft, 26 dB, Wi-Fi and auto mode. It scores 7.7 and covers meaningfully bigger rooms.
See how it ranks against the rest
We score every air purifier in our catalog on the specs that matter.
Best air purifiers of 2026Habilytics scores every air purifier with the same deterministic engine reading published specs: AHAM CADR and rated coverage for clean air, the manufacturer's low-speed decibel figure for quiet, and sensor, auto mode and connectivity for smart. No unit is tested in a lab, and affiliate links never move a score.
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