Over the next three months I’ll be taking you on a walking tour. First, we’ll examine a boiler room, followed by chiller room, and then a central air-handling fan room. I will be pointing out what to look for in providing a quality assurance review of the specific equipment room. This tour can also be an annual or semi-annual training tour, too. It’s important to note that if the reader is a design engineer, he or she should take note of the comments herein as “lessons-learned” about maintaining a clean, well-ventilated, and safe space.