Dismantling of mechanical ventilation system, Renovation of dismantled ventilation ducts and dampers, Installation of ventilation system for cooling the operators to the automat, Installation of ventilation system for fume exhaust from the glass machine, Installation of ventilation system for fume exhaust from surface glass processing, Installation of ventilation system for the cooling of moulds of the glass machine, Installation of mechanical ventilation system for the cooling of the transfer table of the glass machine, Installation and modification of ventilation system in the ventilation room