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Permissible Levels of Ozone Concentration

WHAT IS OZONE?

Ozone is 3 atom molecule of oxygen with weak bonds. It is a powerful oxidizing agent. It is an unstable gas and reverts quickly to diatomic oxygen molecule or O2. When present with VOC, it oxidizes them. In the presence of ozone, VOC is subject to continuous oxidation, transforming it into several transient gases. Resultant gases are totally harmless or less harmful. Total VOC is dramatically reduced. Odor is result of VOC. As VOC are removed, odor is almost completely eliminated. Net result is indoor space with significantly reduced VOC, odor and smoke.

Ozone is beneficial in reducing VOC, Odor and depleting fungi. It is very important to ensure residual level of ozone does not exceed regulatory maximum permissible level.

WHAT ARE PERMISIBLE CONCENTRATION OF OZONE BY REGULATORY BODIES?

OSHA & ACGIH (USA): 0.1 PPM (100 PPB)
FDA: 0.05 PPM (50 PPB)
WHO: 0.05 PPM (50 PPB)
ASHRAE: 0.05 PPM (50 PPB)

HOW TO ENSURE OZONE LEVEL IS BELOW PERMISSIBLE CONCENTRATION?

  • Use Ruks unique design Inline Duct Mounted, Low Production Density, Multi Plate Corona Ozone Generators
  • Operate corona on line frequency
  • Use automatic controllers to regulate ozone generation adequate to remove VOC
  • In occupied space, do not rely on manual controls, sense of smell or personal judgment
  • Use residual ozone monitor
  • Use high ozone cut out device to deactivate ozone generator in the event ozone level is high
  • Where possible, interface control system to build management system to retain records and time history of levels of residual VOC and ozone
  • Do not use annular Corona tubes
  • Do not use portable ozone generators and generators without adequate controls
  • Do not use generators outside air stream that tube ozone into air ducts. Use generators in the air stream
  • Do not use corona that operates on higher than line frequency (60 or 50 Hz)
  • Use Ruks Total Air Quality Monitor CZ8 – Provides all of these features
  • Use Ruks Engineered Ozone System