Ionization/Filter Based/ Ozone generators/Photo Catalytic Oxidation
Clean Air Delivery Rate (CADR) is a measure of Pure Air being delivered (meter cube per hour), by an Air Purifier operating at it’s highest speed setting.
3) Area covered
Air Purifiers can be heavy and bulky, with some requiring a few feet of clearance on all sides. Be sure to measure your available space and allow for all space considerations before you buy. Consumer Reports recommend that you purchase a model with more square-footage capacity than you need, so that you can run the machine Effectively. on its (quieter) “low” setting resulting in less noise and less energy consumption.
4) Types of filters
Filters are the heart of an Air Purifier and it is very important that your Air Purifier has the Best filters. Your Air Purifier should denitely come with a TRUE HEPA Filter. A TRUE HEPA removes 99.97% of particles that have a size of 0.02 microns. Filters that claim to be ‘HEPA-type’, ‘HEPA-like’, ‘HEPA-style’ or ‘99% HEPA’ do not have the same efficiency as TRUE HEPA.
5) Indoor Air Quality indicator
A light indicator changes color in response to the indoor air quality, so that you can adjust the fan speed accordingly. A higher-end Air Purifiers is usually equipped with an Auto Mode function, which would adjust the speed setting in response to the indoor air quality automatically. Some newer models are also available in the market with numerical PM 2.5 display. These help you measure and see exactly how bad the air is.