purchase of maintenance and operation of heating, ventilation, air conditioning (Hvac), sanitary water (Efs/Ecs) and plumbing installations, on behalf of the following social security organizations, meeting in a control group: URSSAF Lower Normandie, URSSAF Haute-Normandie, URSSAF Centre, URSSAF Nord Pas-De-Calais
lot 1 URSSAF Lower Normandy and URSSAF Upper NormandyUrssaf Lower Normandy for the sites of Caen, Saint-Lô and Alençon and URSSAF Upper Normandy for the sites of Rouen, Evreux, Dieppe and Le Havre - operation and maintenance of the installations
lot 2 URSSAF Center Val-De-Loire sites of Olivet, Chartres and Bloisurssaf Centre Val-De-Loire - operation and maintenance of facilities for the olivet, Chartres and Blois sites
lot 3 URSSAF Center Val-De-Loire sites of Châteauroux and Bourgesurssaf Centre Val-De-Loire - operation and maintenance of facilities for the Châteauroux and Bourges sites
lot 4 URSSAF Nord Pas-De-Calais sites of Tourcoing, Lille and Douai and Valenciennes siteurssaf Nord Pas-De-Calais - maintenance and operation of installations for the sites of Tourcoing, Lille and Douai and the Valenciennes site
lot 5 URSSAF Nord Pas-De-Calais sites of arras and Calaisurssaf Nord Pas-De-Calais - maintenance and operation of installations for the sites of Arras and Calais