Page 194 - AGC_EN_iBook

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HeatING, COOLING aND aIR CONDItIONING Of ces
The of ces are currently for the most part open-plan.
Puri ed air distribution is via galvanized steel ducts in the raised oors.The air comes from the air treatment centre with its capacity of 22,520 m3/h and tted with a hygroscopic heat recovery wheel. Air is pulsed to the foot of the facades by oor convectors attached to sound-proofed exible ducts. Output can be controlled manu- ally (from 30 to 100 m3/h).
Air extraction takes place in the ceilings of the toilets.
Air transfer in the partitioned of ces is done by ‘acoustic’ grates. Air conditioning ows in the meeting rooms, managed by the BMS4 system and a Bacnet5 network is controlled by the presence detector belonging to the lighting installations and integrated in the ceiling conductor rail.
The mechanical ventilation of the of ce wings is activated by
a time switch.
The of ces are heated by oor convectors along the facades. One convector for every two 135 cm window sections delivers 700 W of thermal power, offsetting the heat losses of the building’s shell. Working at low temperatures (40/35°C), the convectors are tted with a low-power fan (4.8 W) to activate convection at reduced temperatures.
Water supply to the north and south facades is via separate networks of insulated steel pipes.
The of ces are cooled by the thermal activation of the concrete ceiling, by pulsing fresh air along the facades and by oor convectors.
Outside of ce hours, basic cooling is done by circulating cold water (18/21°C) in the thermoplastic pipes (20 mm external diam- eter) located every 225 mm in the 30 cm thick reinforced concrete slabs, 6 cm from their underside.
Situation in the of ces – summer/winter