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If neither the ground nor ground water is suitable as a heat source, it is perfectly possible to use the outside air. This heat source is also ideal for conversions or for bivalent systems. The defrosting device built into the heat pump means that it can continue to operate at temperatures down to -18°C or below.
In such cases OCHSNER recommends the use of split units, with the heat pump installed indoors where it is protected and the evaporator installed outside to minimise losses.

Advantages: no air ducts, very quiet, long service life and more economical than compact units.
internal_linkPlanning information for air as heat source