Advisory service for the supervision of the design and implementation of energy efficiency measures for multi-family residential buildings approved for R&D financing in 3 lots as follows: OP 1: Supervision of the design and energy renewal works of 11 buildings (listed) on the territory of Meden Mine, Burgas; OP 2: Supervision of the design and energy renewal works of 12 buildings (listed) on the territory of Izgorov and Zornnica, Burgas; OP 3: Supervision of the design and energy renewal works o