#1
Best for strong room cleaning, allergy relief, odor control, and simple operation. Skip it if high filter costs, a larger footprint, or possible nighttime fan noise would bother you.
Pros: particle removal effectiveness, HEPA filtration
Cons: customer support, warranty coverage
#2
Best for serious large-room purification, quiet low-speed operation, and easy roll-around controls. Skip it if expensive proprietary filters, no built-in app/remote control, or sensitivity to filter scent would bother you.
Pros: particle removal effectiveness, dust removal
Cons: customer support, formaldehyde removal
#3
Best for strong room cleaning, responsive auto mode, and allergy or odor help. Skip it if app controls, very quiet bedroom use, low filter costs, or rock-solid reliability matter most.
Pros: pollen removal, handle design
Cons: mold spore reduction, condition on arrival
#4
Choose the AD3500I if you want strong odor, dust, pet and allergy help with phone controls. Skip it if smart reporting must be reliable, filter cost matters, or loud high-speed...
Pros: activated carbon filter, filter life
Cons: VOC reduction, mold spore reduction