The outside air as heat source.
Inexpensive heating without a catch.

Air is available everywhere as a heat source and can be used at any time without requiring approval. For this purpose, ventilator systems are used to draw in the outside air and release it to the outside after it has cooled down. The following overview sums up the benefits and system-related restrictions of air-to-water heat pumps.

• Extensive temperature fluctuations of the outside air during the year (-18 °C to +30 °C)
• The lower the external temperature, the lower the heat output
• The lower the external temperature, the lower the COP
• The evaporator has to be defrosted at external temperatures ranging from -10 °C to +7 °C
• Lower annual performance factor than brine-to-water and water-to-water heat pumps
• Easy installation, as no excavation work is required
• Size of the property does not matter
• Does not require approval by the authorities