Heat Pump

To keep fresh air flowing through the building, an exhaust heat pump or a hot-water heat pump creates a slight under-pressure inside the house. This pressure difference between indoors and outdoors allows air to move naturally through the Ventilation Window and the Sun Wall.

The heat pump captures heat from the warm indoor air before it leaves the building. This way, energy is reused instead of being lost during ventilation.

The heat pump is managed by the same control system that operates the other electronic components in the building. It runs only when there is a need for ventilation or heat production, based on the building’s energy and indoor climate settings.

In larger buildings with many apartments, a central heat pump can be installed in the attic and connected to shared ventilation ducts.