Plus, other steps you can take to improve indoor air quality. Left to right: Air purifiers from Alen, Blueair, and Coway. By ...

The size of the room best suited for the air purifier based on Consumer ... and clean or replace its filter(s). About Overall score for the Alen Breathsmart is mainly how well the model removed ...

Dust, pollen, smoke removal is how well a model cleared air of fine clay dust and cigarette smoke when operating at a low speed that was typically one setting above the lowest speed. Many models ...

The first of the top five brands is Alen, an Austin, Texas-based company focusing solely on air purifiers. Alen places behind the other elite air purifier brands for one reason: reliability.