building partial construction works (Construction categories: special structures. Groups of buildings: residential and non-residential buildings, utilities: water, sewer disposal. Fields of work: building internal and external water supply and sewage disposal, building heating, ventilation and air conditioning systems; electrical works (up to 1000 V, voltage), a safety and fire alarm systems.)

exploit electric equipment (electric engines and generators from 30 kW to 1 MW power exploitation works (to 100 kW power); electric net and equipment to 1000 V exploitation works; special electric equipment exploitation works (only residential and social buildings); electric installation to 1000 V exploitation works)

exploit heating equipment and turbines (heat stations to 1 MW (also with building heating and hot water systems) exploitation works; thermal network to 100 mm conditional diameter DN test works (only hydraulic works); thermal network to 100 mm conditional diameter DN repair works)