This presentation will examine the recently adopted requirements for smoke alarms found in ANSI/UL217 (8^th Edition), and smoke detectors found in ANSI/UL268 (7^th Edition). Although there are over 250 significant technical changes to these standards, we will be focusing on PU foam and cooking nuisance resistance requirements. Following a brief history of the reasoning behind the changes, we will study the research projects used to determine the criteria for testing, then look into the challenges manufacturers are facing and finish up with a view of the codes and compliance dates.

*Original presentation done on December 6, 2018 by Dave Newhouse.