42 Diagnostic services in the field of HVAC systems and components, alarm systems, and lighting systems; Remote monitoring of the functioning and use of building equipment, namely, HVAC, Door access, lighting systems, sound systems, automatic sliding doors, handicap operators, fire doors and emergency notification systems; Providing user authentication services using biometric hardware and software technology for secure entry and exit door access and building room or building area access; Remote monitoring services of heating, ventilating and air conditioning apparatus; Testing of security systems; Sound masking services; Providing Building paging services for mass notification and emergency communications; Paging of people within a building structure; Diagnostic services in the field of variable frequency drives, access control, IP cameras, sound masking, intercoms, and gate equipment; Remote monitoring of the functioning and use of electrical equipment, namely, generators and air conditioners; Providing user authentication services using biometric hardware and software technology for secure entry and exit door access; Remote monitoring services of heating, ventilating and air conditioning apparatus