FOREWORD The intent of Section 7.2.2@ ??Demand-Controlled Local Exhaust Fans@?? is to require fans to have at least one speed setting meeting the minimum required exhaust airflow rate where the corresponding sone rating is 3 or less. This change clarifies this intent. Currently@ the language in this section would permit any fan with a high speed setting exceeding 400 cfm to be exempt from the sone requirement@ even if operating on a lower speed setting. For example@ a kitchen range hood with speed settings of 100@ 200@ and 401 cfm is currently not required to meet the sone requirements at any of these settings. Closing this loop hole will ensure that occupants that have typical-sized range hoods (i.e.@ those with at least one speed setting ??00 cfm) will have at least one speed setting rated ?? sone. Note: In this addendum@ changes to the current standard are indicated in the text by underlining (for additions) and (for deletions) unless the instructions specifically mention some other means of indicating the changes.