Which document provides a basic building systems description and operating plan?

• A. Current facility requirements (CFR).
• B. Facility guide.
• C. Expansion tank.
• D. Enthalpy calculation.

Answer: (B)

A facility guide is designed to give a concise, practical overview of the building’s systems and how they should operate. It typically describes major systems (HVAC, electrical, plumbing), outlines the control strategies, and includes startup, operation, and shutdown procedures, as well as routine operating and maintenance tasks. This combination provides a ready-reference for operators and maintenance staff to understand how the building is supposed to function and how to respond to normal and abnormal conditions. The other options are not documents that describe building systems and operating plans: a current facility requirements document focuses on criteria or standards rather than day-to-day operation; an expansion tank is a piece of hardware; and an enthalpy calculation is a thermodynamic analysis method, not a document describing building operations.