SIDE BY SIDE
See prices, running costs, specifications and trade-offs side by side. Choose two to four products of the same type.
Our pick for a medium room
US model; particle and carbon filter included
$229.99US price, checkedLight, quiet purifier for rooms up to 439 ft², with $44.99 filters every 6 to 9 months
Check price at Blueair for Blueair Blue Pure 311i Max Full review →
Portable air purifier
US AP-1512HH / AP-1512HH(W)
$239.99US price, checkedCompact purifier for rooms up to about 360 ft², with filters near $60 a year
Check price at Coway for Coway Airmega AP-1512HH Mighty Full review →| Criterion | Blueair Blue Pure 311i Max | Coway Airmega AP-1512HH Mighty |
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| US price | $229.99Checked Oct 13, 2026 · Price details in the review | $239.99Checked Oct 13, 2026 · Price details in the review |
| Three-year ownership estimate | $499.93 Incomplete known subtotal. Not included: energy use. | $419.36 Incomplete known subtotal. Not included: energy use. |
| Choose if | A bedroom or office up to 439 ft² where you want low noise, app control and optional smoke or allergen filters. | A bedroom or living room up to about 360 ft² where you want cheap yearly filters and simple controls. |
| Main trade-off | Filters run about $60 to $90 a year, and the three-year warranty depends on registering within 60 days. | Coway publishes only one power figure and a noise range, and no independent listing for this model could be confirmed. |
| Key specifications |
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| Exact variant | US model; particle and carbon filter included | US AP-1512HH / AP-1512HH(W) |
| Dimensions | 19 × 12.5 × 12.5 (height × width × depth). Blueair doesn't give units, but the figures fit inches. It weighs 7.8 lb. | 16.8 × 18.3 × 9.6 in (width × height × depth), or 43 × 46 × 24 cm. It weighs 12.3 lb (5.5 kg). |
| Installation | No installation. It has a 360° intake and a top air outlet, and Blueair says you can place it anywhere. Wi-Fi and the Blueair app add schedules, an on/off timer and filter tracking. The product page gives no wall clearance. | No installation. It sits on the floor and plugs into a standard 120 V outlet. The manual asks for at least 20 cm (about 8 in) from walls and other objects. Leave 30 to 60 cm of open space above it. Keep it 2 m from a TV or other electronics, off sloped surfaces and out of direct sunlight. It's meant for indoor household use. |
| Materials | A washable fabric pre-filter in four colors (Sand, Stockholm Fog, Moss, Limestone) covers the main filter. The standard Particle + Carbon filter pairs a particle layer with activated carbon that Blueair says traps light household odors. Blueair calls the system HEPASilent and says it combines electrostatic and mechanical filtration. SmokeBlock and AllergenBlock filters fit in place of the standard one. | Four stages: a washable pre-filter, a deodorization filter, a HEPA filter and a bipolar device. The manual calls that last stage the ionizer and gives it its own on/off button. The filter set page describes the deodorization filters as carbon filters for odors and gases. |
| Warranty | One year against defects in material or workmanship. Register within 60 days, in your Blueair account or the app, and it extends to three years. Filters are covered for 30 days. Claims require that you've replaced filters on Blueair's schedule, with proof of purchase. Coverage is for the original owner only, and a unit exchanged during the extended term may be refurbished. If you bought it from another seller, you'll need proof of purchase. Blueair also says warranties aren't available from third-party resellers but doesn't define the term. | Coway's manual covers the motor and electronic parts for 3 years from the original retail purchase. Internal and functional parts get 1 year. Coway's support list also puts the AP-1512HH under 3-year coverage. Claims need proof of purchase and a video of the problem. Filters aren't listed as covered. Problems caused by non-genuine filters, skipped filter changes, or commercial or office use are excluded. |
| Returns | 30 days from purchase for items bought directly from Blueair, with a prepaid return label. Filters and pre-filters taken out of their plastic wrap can't be returned. The $5 flat shipping charge and any other shipping charges aren't refunded. Processing takes 10 to 14 days. The refund then reaches your original payment method in 3 to 5 business days. | The product page offers a 30-day money-back guarantee and "30 days free return", with an asterisk pointing to the return policy. That policy gives you 30 days from the ship date to request a return. It also says you pay shipping, handling and processing costs unless Coway made the error. If parts are missing, Coway may charge a restocking fee of 15% of the price or the value of the missing parts, whichever is higher. Refunds go to the original payment method. The policy doesn't say whether opened filters can be returned. |
| Unresolved questions |
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These comparisons use published specifications, not head-to-head tests. Prices and terms are dated. Unknown costs are not zero. Check the exact variant before you buy.