Ground to air heat exchanger

2010-10-01T00:00:00+01:00

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Rehau鈥檚 Awadukt Thermo ground-air heat exchanger has been specified for the Carclaze Community primary school in St Austell, Cornwall

The unit has ben installed on the lower ground floor where natural ventilation was limited. The polypropylene pipework has been laid in a 16 x 30m array 1.5m below the school鈥檚 playing fields. Sixteen runs of 30m long, 250mm diameter pipework and 500mm diameter header pipe were installed through which fresh air is drawn, allowing heat transfer to take place between the air and the ground, which is a fairly constant 8-12潞C all year round.

During the winter, this has the effect of pre-warming the air by up to 9潞C and in summer it can be pre-cooled by as much as 14潞C before it is delivered into the building by way of a series of floor grilles. About 3,500m3 of pre-tempered air can be delivered every hour.

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