Designers can typically choose either type from any major manufacturer. But what are the differences and consequences for a design? What type of space lends itself to one or the other, and what windows of opportunity for real efficiency gains do either provide? Knowing all the differences can make all the difference.
Leaning on experience and data from various K-12 cities and projects, the author pursues some less conventional design approaches. They may revolve around radiant heating and/or cooling, but depending on school size and other factors, the smart use of heat recovery, DOAS, and improved central plants could also put a project on the HVAC honor roll.