Over the summer, my family was driving through southeast Wisconsin when there was a tornado warning. Needing to get off the highway and find shelter, we found an elementary school that was doubled as a tornado shelter. The 1960s-era elementary school looked like it had seen an HVAC upgrade or similar work done in the late 00s/early 10s as the building had a modern dropped ceiling and lighting, although everything from the ceiling down still looked fresh out of the 60s. Presumably from that HVAC upgrade, the building had a Notifier ONYX-series voice-evac capable panel of some kind with Notifier NBG-12 pull stations and Notifier NP-100 addressable smoke detectors. The notification appliances were all System Sensor SPCSW speaker/strobes and SCW strobes. The only area that had wall-mount devices as far as I could tell was the gymnasium, which had System Sensor SPSR speaker/strobes (they actually might have been white now that I think about it… I can’t remember).