Replacement of a heat pump in a 1978 house. All the rooms are heated and ventilated: 10 supply air vents and 8 exhaust air vents. The installation is easy to connect: “4 ducts on the heat pump and T placed at the outlet of the extract air recovery unit. We added a summer air intake on the roof and replaced the thermostat wires with the modbus cable provided. Then the contactors were connected to the radiator contr