GGz Breburg Medical Centre is a specialized mental health institution. 5 Robur air-source Gas Absorption Heat Pumps GAHP-A have been installed. The total power output of heat pumps is approx. 200 kW. The heat pumps have been supplied on a frame, thus resulting in a faster and easier installation. Monitored payback period over time of the the gas absorption heat pumps system installed is equal to 4 years.