ASHRAE and the Chartered Institution of Building Services Engineers (CIBSE), has a reciprocal membership agreement designed to broaden the knowledge of engineers and engineering organizations. Under the agreement, full Members and ASHRAE members without professional engineering licenses are eligible to join CIBSE without undergoing the normal qualifications review into the appropriate CIBSE member grades. Likewise, all CIBSE members can join without undergoing ASHRAE's admissions and advancement review.
The reciprocal membership agreement was created in 2007. Since that time over 130 ASHRAE members have joined CIBSE, and over 150 CIBSE members have joined ASHRAE.
ASHRAE members who are interested in joining CIBSE can learn more about the CIBSE ASHRAE Route to Membership.
CIBSE members that want to join ASHRAE fill out the join form.