Modernization of Common areas for the enjoyment of tenants. High performance make up air unit was designed with heat recovery unit. LED Lighting with space motion sensors. Motion sensors were used to lower or raise the temperature setpoint during unoccupied hours. This provides energy savings. Demand-Control-Ventilation System (CO2) was also designed which would vary fresh air according to occupancy thus reducing energy consumption. We did mechanical and electrical engineering as well as fire alarm and access control design.