Eric, please correct me if I'm wrong but I though a chilled beam was an
induction unit; and eQuest has both powered and non-powered induction
units. Also, if you look at the HVAC units you input there is an Outdoor
Air tab that will let you specify either an Air Change Rate or
Sherman-Grimsrud Method (based on wind) for Natural Ventilation. Either
method requires the creation of schedules, but I've found both to be
effective.

Matthew Higgins, LEED AP + ASHRAE-HPBD