The four penthouses will use the heating-and-cooling version of Modusat, with the remaining 64 apartments using the underfloor-heating version.

The control system uses air temperature, flow temperature and humidity to deliver the correct flow temperature for cooling. Each penthouse will have its own small air-to-water heat-pump chiller to feed the cooling circuit of the Modusat, which will supply heated or chilled water to the Rehau underfloor pipework. A simple changeover from winter to summer activates the cooling circuit.

This approach to cooling cools the fabric of the building, so there will be no draughts or fan noise.

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