The call for tenders concerns a "multi-equipment" maintenance contract, which may, depending on the residences, include:

- individual equipment for heating gas and hot water production,

- individual or collective equipment for single or dual flow controlled mechanical ventilation, assisted natural ventilation, low pressure mechanical ventilation,

- sanitary tapware (housing perimeter),

- specific equipment known as "ENR" (renewable energy): solar ECS modules, thermodynamic cumulus, PAC ...

203 residences and 4,255 housing units - ARI heritage in the agglomerations of Rive-de-Gier, Saint-Étienne and surrounding areas.

110 residences and 2 034 dwellings - IRA patrimony on agglomerations of Tarare, Villefranche-sur-Saône and surroundings.

184 residences and 4,230 housing units - IRA assets in the north of Lyon.

179 residences and 4 611 dwellings - IRA patrimony on the south of Lyon.

68 residences and 2,394 dwellings - IRA heritage in northern Isère and agglomeration of Grenoble.

46 residences and 1 056 dwellings in department 73, 74 and Gex (Ain).