The company CityPlan is the major processor of optimisation studies for energy management and technical energy audits of hundreds of buildings and manufacturing objects. The most significant references include processing of energy audits in accordance with the Act no. 406/2000 Coll. for urban parts Prague 4, Prague 7, Central Bohemian and Olomouc region, the city of Liberec, hospitals in Litoměřice, Mladá Boleslav, Jablonec nad Nisou and other.