| Client | Blockheizkraftwerks, Träger- und Betreibergesellschaft mbH Berlin (BTB), Germany (subsidiary of E.ON) | Stadtwerke Heidelberg, Germany |
| Supplier of heat pump | Friotherm, Switzerland | Johnson Controls, Denmark |
| Type of heat pump | Water-water heat pumpel | Air/water-water heat pumps |
| Product type of heat pump | Unitop 28/22CY | Sabroe DualPac T716V/112LV |
| Electric power of heat pump | Two times 1.8 MWel | Three units of 455 kWel each |
| Total thermal capacity of heat pump | Two units of 3.5 MWth each | Three units of 1.35 MWth each |
| Date of commissioning | July 2023 | Installation in June and December 2023, commissioning not yet finalised due to technical problems |
| Type of compressor | Two-stage turbo | Two-stage piston |
| Type of refrigerant | R1234ze | F717 (ammonia) |
| Type and temperature of heat source | River water of at least 8 °C and up to 27 °C | Air of at least 5 °C |
| Temperature level of delivered heat | Up to 95 °C | Up to 85 °C |
| Coefficient of performance (COP) | ≈ 2,5 (at a heat supply temperature of 90 °C) | 2.2 (at air temperatures of at least 15 °C and a supply temperature of 90 °C) |
| Operation mode | Depending on river temperature, between April and November | Main time spring and autumn |
| Standard product or custom-made? | Custom-made system | Standard product with design specification |