Contact a controls company to determine if a Building Management System to control heat, ventilation, lighting etc. is appropriate for your building

Why

A building management system is like having a really good building operator paying attention to temperature, ventillation and other needs at multiple points in your building 24 hours a day.

How

A programmable thermostat is a very simple Building Management System (BMS).  Controls companies carry systems that can centrally control temperature, ventillation, humidity, lighting, security, boiler operation etc.  Control can be based on a schedule, occupancy, and/or weather.  Depending on the system, you can remotely control your building while off-site.  Contact a controls company to see what sort of system may be right for your building needs.  Normally, a BMS is appropriate for larger buildings, rather than small ones.