Balboa Ozone CD without Chip (New Model)This Ozone activates usually during a pre programmed filter cycle some Hot Tubs have a 24hr circulation and Ozone mode. We recommend that your Ozone should run for between 6 and 8 hours a day. The unit does not blow air air is drawn through the Ozone on a venturi system. Usually you will find a designated water jet plumbed into the shell of the Hot Tub somewhere near the centre or sometimes a drain. Water will pass through the jet sucking in air