Ozone 

 Ion Generator

Activated Carbon

 UV Light

 HEPA

 Pre-Filter

Electrostatic  Filter 

 HEPA Vacuum

Dehumidifier 

Dust

 drop dust to floor

 drop dust to floor

 yes

 yes

yes 

yes 

 Dust Mites

yes 

 yes

 yes

 yes

 yes

 yes

 yes

 Pollen & Allergens

 drop to floor

 drop to floor

 yes

 yes

 yes

 Viruses

 yes

yes

 yes

Bacteria

 yes

yes 

 yes

Airborne Mold Spores

yes 

yes

yes 

 yes

 yes 

 yes

 Mold

 yes

 yes

yes 

 Micro Organisms

yes 

yes

yes 

 Bad Odors

yes 

yes 

yes 

yes 

Smoke

 yes

yes 

 yes

yes 

 Chemical Fumes

 yes

yes 

Some special types of carbon filters

yes 

Downfall of air purifier

Slight smell; Must limit concentration of ozone

Air Purifier can leave black mark if close to wall 

 Need to change periodically

May give off ozone

 Requires filter change

 Requires filter change

 Requires filter change or cleaning

Requires filter change

Requires emptying of water tank