Founded in 2009 in Johnson City, Tennessee, Greentech Environmental is a leader in air purification systems for both consumer and commercial applications. Greentech takes pride in its multi-technology approach to solving the toughest air quality problems, which continues to advance through the recent release of Greentech Filters with ODOGard. This is the only filter on the market that destroys odors at the molecular level while significantly improving air quality for your employees, customers, and neighbors.