37 Construction, installation, maintenance and repair of electric, thermal, heating and cooling, energy production and distribution installations, namely, installations for heating, air-conditioning and urban heating networks in the nature of power plants, pipelines, pipes, cogeneration plants, biomass plants, photovoltaic farms, nuclear plants; maintenance of thermal equipment, namely solar thermal installations, heating equipment, cooling systems, humidifiers, boiler room equipment, boilers; installation, management and maintenance of technical equipment relating to electricity, fire protection and refrigeration; rust proofing; leasing of heating devices, cooling devices, ventilation devices and air-conditioning devices