Professional recommendation for an ozone shock treatment is 1,000 mg of Ozone output for 100 square feet of space with 10-foot ceilings or 1,000 cubic feet. Treatment times vary based upon the severity of the pollutants and the nature/design of the space. For example, using this standard, the SanusAer® 20000 should effectively treat up to 2,000 square feet (20,000 cubic feet) on the 'high' setting. Click below to determine the size of the generator ideally suited for your needs.