Filterless Air Purifier

Air purifier buying tips

Go with a comprehensive long term warranty if you can find one (although most offer only limited warranty).
Check if warranty covers internal components.

Identify the particular pollutant that is affecting your health. Choose the type of air purifier that handles that pollutant the best. Do that by getting an air test kit.
A model that remove the most number of particles from the air and the capability of removing micro particles.
You might desire a unit that is especially quiet. Some manufacturer claim their product to be so. Make sure you give it a test and listen for yourself.
Test use the system and see if it’s easy to use. Operating, filtering changing and cleaning should never be too much of a hassle.
Check for hidden cost. Replacing filters can potentially turn out to be costly. Check out the replacement intervals as well as the replacement cost.
As with any brand, check for the reputation of the manufacturer.
Different models are designed for certain room sizes. Check for the air volume capacity and recommended room size unit.