Issue 3/2013 of the magazine presents an extensive material for modern building installations in the new City Clinic hospital. Projects section contains also "Voice evacuation system and background sound in Paradise Center in Sofia". The Lighting section containes a material for adaptive outdoor lighting and its potential to reduce electricity costs. Automatic and semi-automatic fire water systems are the focus of the section on security systems. HVAC section presents an interesting discussion of possible technical alternatives to central heating. Participants views and their suggestions for more energy efficient installations can be found on page 37. Among the other interesting topics are "Underground drainage systems" and "Electric screwdrivers".