Air purifier · medium-room
Coway Airmega AP-1512HH Mighty
AHAM-verified, true sealed HEPA, cheap to run, no ozone. The honest benchmark.
Total cost of ownership
- Annual filters
- $36/yr
- Device
- $230
- 5-year total
- $410
Certifications
- AHAM VerifideCADR
- Energy Starefficiency
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 no ionizer and no ozone-generating stage. 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
- no ionizer and no ozone-generating stage
- 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
Strengths
- + Verified Performance: 10.0/10
- + Certification: 8.0/10
- + Safety: 8.0/10
- + Practical Fit: 10.0/10
Watch-outs
- No significant weaknesses flagged.
Who it is for
- · Bedrooms and medium living spaces
- · Anyone sensitive to ozone, or with asthma or allergies
- · 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
8.0/10 · 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.
- +3Published lab-tested efficiency AAHAM-listed CADR - Filtration performance is independently lab-tested and published.
Safety
8.0/10 · 15%Ozone and ionizer behavior. Ozone generators hard-fail.
- +8No ozone-generating technology Ano ionizer / no ozone - No ionizer, plasma, or ozone-emitting stage.
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
- 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.
Related guides
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 2026-05-29. Scored under air-v1.0. Prices and certifications are re-verified on a cadence; see the methodology for how each rule fires.