This portable air purifier from GermGuardian is primarily filter-based and has a filter indicator and programmable timer, dirt sensor, and 5 speeds. It’s designed for floor or tabletop use in a medium-sized room.
Overall score for the GermGuardian CDAP4500BCA 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 lower 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.
Filter-life indicatorIndicates when to change or clean the filters.
Remote controlIncludes a remote control to operate the air purifier.
Auto fan speed
Auto fan speedOn Auto mode, a built-in dirt sensor or other inputs will allow the fan to run on a higher fan speed when the air is determined to be dirty and on a lower speed when clean.
Product typeThe cleaning technology used by the Air Purifier.
WeightWeight of the Air Purifier to the nearest pound.
Energy starModels that have the Energy Star rating will use less energy than comparable products.
Number of fan speeds
Number of fan speedsFan speeds available to the user.