The NIRON PPR system was used for the new air conditioning system of a public building located in Hospitalet de Llobregat in Spain. The building previously had a number of cooling systems placed on the roof. Its new form provided for the connection to the district heating network and the relocation of the entire production room to the parking lot. All air vents are in the highest part of the building contribute to avoiding power losses. NIRON is a complete polypropylene pipe and fitting system for the distribution of hot and cold water in plumbing and air conditioning systems and for the conveyance of drinking water and alimentary fluids in industrial plants. The pipes and fittings that compose the NIRON range are manufactured using random copolymer polypropylene (PPR and PP-RCT), a plastic material with a special molecular structure ensuring high mechanical resistance and duration, even at high temperatures and pressures.