Which is better for a large living room?

The Coway. Its 248 CADR and 361 sq ft rating clean far more air than the Dyson's 72.8 CADR. The Dyson is better suited to a desk or bedside spot where you also want a breeze.

Which is quieter at night?

The Coway, at a 24 dB minimum versus 33.8 dB for the Dyson. Both have timers and auto modes, but the Coway is the safer pick for a bedroom.

Is the Dyson worth the extra money?

Only if you value the fan function and slim tower design. For purification alone the Coway delivers much more cleaning capacity, so the Dyson's premium buys cooling and looks, not air cleaning.

Does either one produce ozone?

The Coway's ionizer emits 9 ppb of ozone, which you can avoid by turning the ionizer off. The Dyson uses HEPA and carbon with no ionic filtration, so it does not add ozone.

Do either work with Alexa?

Both list Alexa support. The Dyson also includes a remote; the Coway has no remote and is controlled on the unit.

Neither maker states a motor life here. Both use replaceable non-permanent HEPA filters, so ongoing cost is filter replacement; the Coway's pre-filter can be vacuumed to stretch the HEPA filter.

Dyson Pure Cool Tower Purifier Fan vs Coway Airmega AP-1512HH Mighty

Buy the Coway Airmega AP-1512HH Mighty if clean air per dollar is the goal: its CADR of 248 (dust) is far higher than the Dyson's 72.8 (pollen), and it runs quieter at its low end (24 dB vs 33.8 dB). Buy the Dyson Pure Cool Tower if you want one machine that also cools you and fits in a corner, since it is a purifier and fan in one and stands 40.1 in tall at just 4.3 in deep. The Dyson costs more and cleans much less air, so the Coway is the better value for pure purification.

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