Reflecting on the topics we have covered in this course, complete the following posts by examining the following questions:

1. Have you ever been a party to an energy audit? If so, what did if you learn and if not, would you do one and why or why not?
2. Building "utility commissioning", should it be an item on your CPM or project management check list and if so why or why not?
3. What is the impact onto having an expansion loop in a plumbing circuit?
4. Why is the use of "drainage fixture unit system" a standard practice, are their advantages or disadvantages?