When you've seen one mechanical room, you've seen them all.
Most mechanical rooms are dramatically different for a number of reasons and in a number of ways.
Additionally, similar structures are usually outfitted differently based on financial issues and preference. It all goes back to 1990. Picture Schaumburg Township, School District 54, spanning 32 square miles, with 27 schools receiving students from portions of seven Chicago suburbs. The district collectively encompasses 1.7 million square feet of building space of which five hundred thousand square feet of classroom space was not air conditioned, and educates over 16,000 K-8 students. Many of the schools were built quickly and cheaply to meet rapid growth in the 1960's and early 1970's.