A building energy and environment information system for buildings and campuses. The invention provides an entirely elective and private incrementally deployed, incrementally modifiable, relatively inexpensive building information system that provides for a range of energy and environmental capabilities including room and building environment sensing (one or more of temperature, humidity, air quality, etc.), statistical processing software, modeling software, analysis software, information visualization software, decision support software, data logging, storage and recall, control arrangements, and interfacing with existing building systems (HVAC, solar, valves, power systems, etc.), external information systems and networks. The invention can be used for various purposes including trial deployment of equipment and software; exploratory or special-purpose information gathering; analysis, modeling, or simulation of current, past, or ongoing energy usage, loss, or waste as well as air temperature and quality distributions, impacts of changes to a building, facilities, policies, or operations; design of optimal control for building operation.