Come join the Chicago Chapter (CHIBPSA) of the International Building Peformance Simulation Association (IBPSA-USA) for our fall meetup and 2023 ASHRAE Building Performance Analysis Conference (BPAC) decompression! CHIBPSA’s quarterly meetup is primarily an opportunity to network, share a drink, talk shop, and otherwise commiserate with other Chicago-area building simulation practitioners. It’s also a chance to take a tour of our host’s office, get an update on local and national IBPSA goings-on and listen to a technical presentation. Our annual Fall meetup features content from presentations by Argonne National Laboratory modeling from the annual BPAC conference, taking place this year on 9/11-9/13 in Austin, TX. Topics include future weather generation and modeling and the new ASHRAE 140 acceptance criteria. Refreshments served!