No sprinklers. Many states are requiring older assisted living facilities to be retrofitted usually based on criteria such as over a certain occupancy limit and building height and type of construction.
Mass. law does not require such retrofit for all buildings but does provides the following,
“The state also established a local option to permit municipalities to require that sprinklers be provided in all
boarding homes with more than five residents.”
Constructed in 1990's it had them and article mentions them going off. These type of facilities especially wood frame should be one story constructed. Evening staff is often reduced at care facilities. Which would have slowed evacuation process especially using stairs as the only route. I am a retired healthcare facility {assisted living/nursing home} maintenance mechanic. Assisted living were in one story apartments. Nursing home patients were in a concrete 5 story building. Some assisted living did have kitchens and we cut the power off to any oven and stove in rooms we considered high risk residents.
These facilities often labeled NPO's are anything but that. The profits end ip in paid B.O.D. s and administrators pockets even at the expense of needed upkeep cost.