Position of ASHRAE on reducing fresh air intake:
“ASHRAE approves reduction in fresh air, if
chemical contaminants in air are removed”.
We refer you to the following sections of ASHRAE62-99:
“Procedure for use of cleaned recirculated air: The amount of
outdoor air may be reduced by recirculating air from which
offending contaminants have been removed or converted to less
objectionable forms. Formaldehyde, for example may be oxidized
to water and carbon dioxide. The amount of outdoor air depends
on the contaminants generated in the space, etc ......”.
» ASHRAE Ventilation code no. 62-1999.
» Minimum 15 CFM per person fresh air is required.
» Minimum of 30 CFM fresh air is required if smoking is
Chemtronics’ Solutions to minimize
“Fresh Air Intake”
How to reduce “Fresh
» By using controlled injection of ozone.
» Oxidation of Volatile Organic Compound (VOC) is performed by
ozone and not by oxygen of the fresh air.
» Ozone is more powerful oxidizing agent than oxygen.
» In the presence of a more powerful oxidant, less powerful
oxidant does not have the chance to perform oxidation, until no
more of the former is available.
» Oxygen of the fresh air is preserved and not spent in
performing the task of oxidizing the Volatile Organic Compound
(VOC), which is now transferred to ozone.
» Available oxygen is now used entirely to maintain
» Intake of fresh air is reduced drastically. Thus fresh air
requirement goes down to 5CFM or less per person.