During peak day light hours, the solar PV system will generate enough power for all of the lighting and receptacle load. The only power consumed by Optima Engineering will be for the HVAC system which is a high efficient VAV system with demand control ventilation and economizer cycle to provide 'free cooling' when outdoor conditions are in the right temperature and humidity ranges. The building is also provided with a solar water heating system to generate all hot water for the building core spaces.