A lot of things are out of your control when working on a job involving multiple trades. Whenever I design any type of system, I always go down a list of “what ifs.” The “what ifs” are scenarios that can affect the performance of a system due to an unknown. This includes actions by other trades.

A great example is one of the first solar thermal installations we performed at a small market that sold and prepared meals grown by the local college — this college had a strong agriculture and farming program.