THE PROPOSED PLANT REDEVELOPMENT INVOLVES THE REALISATION OF AN AIR CONDITIONING SYSTEM WITH ALL EXTERNAL AIR, WITH PROMPT MESSAGES AND SHOTS IN INDIVIDUAL ENVIRONMENTS TO AVOID AIR CIRCULATION, WITH THE POSSIBILITY OF REGULATING THE FLOW. IN PARTICULAR, SPACES HELD UNDER OVERPRESSURE (POSITIVE PRESSURE) MAY, BY MEANS OF APPROPRIATE AUTOMATIC ADJUSTMENT SYSTEM, BE BROUGHT INTO A DEPRESSION (NEGATIVE PRESSURE), SO AS NOT TO RELEASE CONTAMINATED AIR INTO THE NEIGHBORING PREMISES. FOUR INDEPENDENT PLANTS WILL BE BUILT, EACH BELONGING TO ITS OWN AIR TREATMENT UNIT, IN TURN FED INDEPENDENTLY BY HOT AND COLD FLUIDS.