ASHRAE Standard 62-1999, “Ventilation for Acceptable Indoor Air Quality,” sets minimum ventilation rates and other requirements for commercial and institutional buildings. Under addendum 62b, the scope of the standard would have been limited to new buildings, additions, and changes to existing buildings specifically identified in the standard.
The addendum was withdrawn because the committee writing the standard determined that the scope should state “what” the requirements of the standard cover, not “when” the requirements are applied, according to committee members.
In addition, the committee determined that building codes and other regulatory bodies stipulate when to enforce code requirements. If the standard was adopted by such authorities, including such stipulation in the scope could result in conflicts within the building code.
The addendum, which has completed two public reviews, was developed because some of the requirements in the standard were developed with new buildings in mind, said Andy Persily, chairman of ASHRAE SSPC 62.1.
In other business, the committee recommended addendum 62ab for public review. The proposed addendum states that equipment intended to be exhausted shall be provided with means so that contaminants do not recirculate into occupied spaces unless the equipment is designed to be exhausted indoors.
The committee also began updating contaminant concentration guidelines that define maximum allowable indoor levels of contaminants.
Publication date: 10/30/2000