Blueair Blue Pure 311i Max vs Coway Airmega AP-1512HHS

Blueair Blue Pure 311i Max wins on verified performance, sensing and running cost: AHAM Verifide 283 CFM smoke CADR, PM1, PM2.5 and PM10 readings and a 7.8 W draw. Coway Airmega AP-1512HHS answers with a True HEPA stack, an optional ionizer and a 3 year warranty, which is three times the Blueair's coverage.

How performance is proven. Blueair Blue Pure 311i Max publishes an AHAM Verifide 283 CFM smoke CADR for 439 sq ft, measured in a standard chamber. Coway Airmega AP-1512HHS is not AHAM Verifide, so its 788 sq ft claim rests on the manufacturer's own testing at a lower air change rate, with a 210 CFM CADR.

Blueair Blue Pure 311i Max, by a wide margin: it is Energy Star certified and draws 7.8 W at full speed, against 80 W for Coway Airmega AP-1512HHS. On a purifier intended to run continuously that is the single largest ownership difference between the two.

Coway Airmega AP-1512HHS, with 3 years, unusually long in this category. Blueair Blue Pure 311i Max is covered for 1 year. Both use washable pre-filters, though the Blueair's main particle and carbon filter is rated at 9 months and the Coway's HEPA and carbon filters at about a year.

Coway Airmega AP-1512HHS includes an ionizer stage with its own button, which testing bodies generally recommend leaving switched off; the mechanical filtration works fully without it. Blueair Blue Pure 311i Max has no ionizer, using HEPASilent electrostatic charging ahead of a mechanical filter instead.

Buyers who want a compact, very quiet bedroom purifier with True HEPA filtration and the reassurance of a 3 year warranty, plus an Eco Mode that stops the fan when the air is clean. If you would rather have certified airflow figures, three-size particle data and a tiny power bill, Blueair Blue Pure 311i Max is the better fit.