3. ANSI/AIHA Z9.5 Laboratory Ventilation Standard
The 2003 version of this standard is the latest published version of this standard. With respect to
laboratory air change rates and ventilation the standard does not take a prescriptive approach. The
format of this standard is that it has both a requirements section as expressed by the use of “shall”,
and a recommended section that provides description and explanation of the requirements plus
suggested good practices as expressed by the use of “should.” The text of the relevant sections is
as follows:
Section 2.1.2 - Volume Flow Rates/Room Ventilation Rate (2003):
Requirements:
The specific room ventilation rate shall be established or agreed upon by the owner or
his/her designee