We use zero carbon and passive energy design to reduce the cost of building energy usage. We provided the analysis and reports for a $10M USD industrial building trigeneration plant in Ocala, Florida with a projected payback period of 7 years. The system was fueled by both diesel and natural gas and employed absorption chillers to transform the free excess heat emanating from the generator into cooling for the building. We have also done extensive study on the use of large boiler units which use waste wood biomass as an energy source, to provide CCHP. Case studies have shown that it is possible to reduce cooling and electrical costs of an existing building by over 50% with proper design planning. For the proposed 10,500sm Magna Arts and Education building, we designed a ground source heat pump system, using the earth as a reservoir to extract heating and cooling for the building systems.