The HealthPro features the same advanced micro- and nano-particle filter technologies as the HealthPro Plus, however without the gas and odor filter (V-5 Cell). The HealthPro effectively removes every type of particulate air pollutants, including all common allergens. The system has a spare compartment that can at any time be upgraded with a the V-5 Cell (wide-spectrum gas and molecular filter) to help eliminate gaseous chemicals and odors. This makes the HealthPro the ideal choice for allergy sufferers and other health-conscious individuals that need ultra high-efficiency particle removal with the option of later adding gas and odor removal