This portable air purifier from Alen is primarily filter-based and has a filter indicator and dirt sensor, and 4 speeds. It’s designed for floor or tabletop use in a large room. and weighs 22.3 pounds.
Overall score for the Alen Breathsmart is mainly how well the model removed dust and smoke from a test chamber, plus quietness for room purifiers. Dust/pollen/smoke removal: How well models cleared air of fine clay dust and cigarette smoke; performance of portables is at their highest and lowest speeds. Ones that scored well for dust removal should perform comparably for pollen. Noise: Based on instrument measurements with a portable model running at its highest and lowest speeds.