Air purifier · medium-room
Coway Airmega AP-1512HH Mighty
AHAM-verified, true sealed HEPA, cheap to run, defeatable ionizer with CARB-certified negligible ozone. The honest benchmark.
Bottom line
In our scoring the Coway Airmega AP-1512HH Mighty earns 8.5/10, one of the stronger picks in its class, and it stands out on verified performance (10.0/10). On the data, its 246 cfm CADR is AHAM-verified. Filters run about $36 a year (~$410 over five years with the device), among the cheapest to run in our set. Its weakest area in our scoring is safety (5.0/10).
Where to buy
Check the current price on AmazonAffiliate link: we may earn a commission at no extra cost to you. It never changes a score - how we handle this.
Total cost of ownership
Checked 45 days ago- Annual filters
- $36/yr
- Device
- $230
- 5-year total
- $410
Certifications
- AHAM VerifideCADR
- Energy Starefficiency
- California Air Cleaner Regulationozone
Filters only protect you on their swap schedule. Get an email reminder when this one is due - one note around swap time, nothing else.
Overview
The Coway Airmega AP-1512HH Mighty is a medium-room air purifier built around a True HEPA sealed-system filter. Its Clean Air Delivery Rate is AHAM-verified at 246 cfm, and it uses a defeatable ionizer (can be switched off). Filters run about $36 per year, among the cheapest to run in our set.
By the numbers
- Clean Air Delivery Rate
- 246 cfm (AHAM-verified)
- Real coverage at 4.8 ACH
- ~381 sq ft
- Manufacturer room claim
- 361 sq ft
- Filter
- True HEPA, sealed system + 90 g activated carbon
- Ozone / ionizer
- a defeatable ionizer (can be switched off)
- Noise (low)
- 24 dBA, 24 dBA sleep
- Power draw
- 8 W
- Annual filter cost
- $36/yr
- 5-year cost of ownership
- $410 (device + filters)
- Certifications
- AHAM Verifide, Energy Star, California Air Cleaner Regulation
Strengths
- + Verified Performance: 10.0/10
- + Certification: 10.0/10
- + Practical Fit: 10.0/10
Watch-outs
- No significant weaknesses flagged.
Who it is for
- · Bedrooms and medium living spaces
- · Light sleepers - it is near-silent on its lowest setting
- · Budget-minded buyers - filters are cheap to replace
What to know before buying
- · The replacement is Coway part #3304899, a set with one Max2 Green True HEPA filter plus a carbon deodorization filter; Coway lists the HEPA for yearly replacement and the carbon for about every six months.
- · The included pre-filter is washable and meant to be rinsed and reused rather than replaced, and the unit has a filter-change indicator light.
- · AHAM CADR is 246 dust / 233 smoke / 240 pollen for roughly 361 sq ft; measured noise runs from about 24 dB on low to around 53 dB at top speed.
How it scored
Verified Performance
10.0/10 · 30%AHAM CADR, true sealed HEPA, air changes per hour, honest room-size match.
- +3AHAM Verifide CADR published A246 cfm (AHAM Verifide) - CADR is third-party verified by AHAM, not a manufacturer claim.
- +2True/HEPA-class sealed system ATrue HEPA, sealed - True HEPA or H13/H14 in a sealed path so air cannot bypass the filter.
- +2Hits ~5 air changes/hour at rated room B5.1 ACH at 361 sq ft - Delivers at least 4.8 air changes per hour at its rated room size.
- +2Honest room-size claim Brated 361 sq ft, CADR supports 381 - Claimed room size is within what the unit's own CADR can clean.
- +1Activated carbon weight disclosed B90 g carbon - Discloses activated-carbon weight for VOC, odor, and smoke.
Total Cost of Ownership
7.0/10 · 25%Computed annual filter cost vs the room-size class median. The number nobody surfaces.
- +5Annual filter cost vs class median A$36.00/yr (below class median) - Computed annual filter cost scored against the room-size class median.
- +1No proprietary filter lock-in Bcross-compatible filters - Filters are sold separately with cross-compatible equivalents.
- +1Washable pre-filter Bwashable pre-filter - A washable pre-filter extends main-filter life and lowers running cost.
Certification
10.0/10 · 15%AHAM Verifide, Energy Star, CARB, published lab efficiency.
- +3AHAM Verifide seal AAHAM Verifide - Carries the AHAM Verifide performance seal.
- +2Energy Star certified AEnergy Star - Energy Star certified for energy efficiency.
- +2CARB certified ACARB compliant - Meets California's air-cleaning-device ozone-emission rules.
- +3Published lab-tested efficiency AAHAM-listed CADR - Filtration performance is independently lab-tested and published.
Safety
5.0/10 · 15%Ozone and ionizer behavior. Ozone generators hard-fail.
- +5Ionizer is CARB-certified and defeatable ACARB ionizer, switchable - Ionizer can be turned off and meets CARB ozone limits.
Practical Fit
10.0/10 · 15%Noise, filter-change indicator, energy draw. Smart features are neutral.
- +4Quiet at low speed B24 dBA low - Runs at 50 dBA or quieter on its lowest useful speed.
- +2Near-silent sleep mode B24 dBA sleep - Sleep/night setting is 30 dBA or quieter.
- +2Filter-change indicator Bindicator present - Tells you when the filter actually needs replacing.
- +2Energy draw disclosed B8 W - Discloses power draw at a standard speed.
- ·Smart features (neutral) Capp / auto mode - App control and auto mode are neither rewarded nor penalized.
FAQ
- Is the Coway Airmega AP-1512HH Mighty's CADR AHAM-verified, and does it emit ozone?
- Its 246 cfm Clean Air Delivery Rate is AHAM-verified - independently tested, not a box claim. It has a defeatable ionizer, CARB-certified for low ozone.
- How often do I replace the filters and what does it cost?
- Coway recommends replacing the True HEPA filter about once a year and the carbon filter about every six months. Genuine #3304899 sets are commonly sold in the $35 to $45 range.
- Does it emit ozone?
- It is a mechanical HEPA-plus-carbon unit with no ionizer running by default, though it includes an optional ionizer mode that can be left off.
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This score is our opinion under our published rubric, not a statement of objective fact or a lab test of this product. We score what third-party certifications prove; absence of a certification means we found no verification, not that a product fails to perform. Last reviewed 2026-06-06. Scored under air-v1.0. Prices were last checked 45 days ago; the freshness chip above the cost panel shows the current state. See the methodology for how each rule fires.