Research indicates that being casual with actual tube placement can cause extra trouble, at least in terms of the system's performance and energy demands. Here's the news on finding just the right depth. By John Siegenthaler, P.E.
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.