<html><head></head><body><div>An electronic copy of ASHRAE-55, latest version? I hear about using airflow as a measurement to improve air quality, whereas I always used CO2 measurements. Very confusing.</div><div><br></div><div>John R. Aulbach, PE</div><div class="ydp504142bbyahoo-style-wrap" style="font-family: verdana, helvetica, sans-serif; font-size: 16px;"></div></body></html>