Patent ID: 9737841
Date: 2017-08-22
CPC Classifications: B01D,F24F,Y02A,Y02B

Claim:
1. A method of purifying air comprising: directing air through a particle removal filter that acts to filter the air for particle phase pollutants to thereby produce particulate filtered air; and directing an amount of the particulate filtered air through a gas removal filter that acts to filter the particulate filtered air for gas phase pollutants to thereby produce gas filtered air; wherein the air is directed through the particle removal filter using a first blower; the particulate filtered air is directed through the gas removal filter using a second blower; the particle removal filter with the first blower and the gas removal filter with the second blower are separately housed in two different enclosures, the particle removal filter with the first blower and the gas removal filter with the second blower are allowed to operate as two different units; the two different units are selectable to operate separately without connection in a first mode, and to operate together connectively in a second mode; when the two different units are selected to operate together connectively in the second mode, the amount of particulate filtered air directed through the gas removal filter is based on a concentration of particle phase pollutants in the air.