Patent ID: 7300624

Claim:
A method of reducing microbial levels in the interior of a building, comprising: (a) vaporizing an anti-microbial essential oil to produce vaporized anti-microbial essential oil, the vaporizing comprising the steps of: i. placing balls made of chemical fibers in an air scrubber; ii. coating the surfaces of the balls with the anti-microbial essential oil by: a. placing a spiral wound tube within the air scrubber, the tube having perforations therein, and, b. pumping the essential oil through the tube so that the essential oil escapes through the perforations and coats the surfaces of the balls; and, iii. admitting a stream of air into the air scrubber through the balls to vaporize the anti-microbial essential oil and entrain the vaporized oil in the air stream; (b) directing the resulting oil-entrained air stream out of an outlet of the air scrubber; and, (c) directing the air stream of step (b) into the air ducts of the building and thereby into an interior air supply of the building.