Maintenance (periodic maintenance and troubleshooting), individual gas boilers, electric balloons, mechanical ventilation systems (type VMC sanitary and VMC gas) as well as alarm devices for VMC gas networks, concerning a set of 333 dwellings distributed on the buildings of the ZAC des Hautes Bruyères in Villejuif (94800 ).

Maintenance (periodic maintenance and troubleshooting), individual gas boilers, electric balloons, mechanical ventilation systems (type VMC sanitary and VMC gas) as well as alarm devices for VMC gas networks, concerning a set of 333 dwellings distributed on the buildings of the ZAC des Hautes Bruyères in Villejuif (94800 ).