1.0 Introduction
This document provides an overview of current US and European design practices, standards, and
regulations regarding laboratory air change rate minimums for dilution ventilation.
2.0 Executive Summary
In the US and Europe there are no prescriptive requirements for air change rates in labs other than
the ASHRAE 62.1-2010 fresh air requirements for university/college laboratories that corresponds
to about 1.2 ACH (.18 cfm/sq. ft or 0.9l/s/m2). In terms of recommended levels, standards are also
significantly moving away from the prescribed values of the past to a more performance based
approach based on the specific requirements of a given lab space.