In issue 1/2013 we present the latest trends in building automation systems. Continuation of the topics from the last issue examines the specifics of the HVAC and fire extinguishing installations in Bulgaria Mall, and the building installations in the newly build Paradise Mall. The focus in the section for electrical equipment are the electrical cable trays and the maintaining of the functionality of the electrical installation in the event of a fire in the building. In the section for energy efficiency you can read about the specifics of insulations in low-energy and passive buildings. The HVAC section in this issue focuses on heat pump systems and the opportunities for their year-round use. Technologies for water treatment and purification of water in swimming pools can be found in the section for water and sewage.