Software as a service (SAAS) featuring software for controlling, optimizing, and maintaining HVAC equipment; Software as a service (SAAS) featuring software for energy efficiency; Software as a service (SAAS) featuring software for building management services; Artificial intelligence (AI) services in the nature of an AI control algorithm for energy optimization to run buildings more efficiently; Artificial intelligence (AI) services in the nature of an AI-enabled virtual building agent; Providing online non-downloadable computer software for use in controlling heating, ventilating, and air conditioning equipment; HVAC optimization services; providing online non-downloadable software in the nature of a building management system; virtual building management system for managing building systems, for building maintenance, and for troubleshooting; providing online non-downloadable computer software for building automation