Vaillant heat pump in TapHome: temperatures, setpoints and energy over eBUS

Why and how you would use it

Vaillant heat pumps and boilers are in many houses where TapHome controls the rooms. The heat pump has its own controller, usually the sensoCOMFORT VRC 720, and its own app. TapHome then does not know the outdoor temperature the heat pump sees, the hot water temperature or how much electricity the heat pump uses, and it cannot lower the room setpoint when nobody is at home.

A typical case: a house with an aroTHERM plus heat pump and photovoltaics. The owner wants TapHome to heat the hot water when the panels produce surplus power, to see the heat pump consumption next to the other meters, and to set a lower temperature during a holiday, without opening the Vaillant app.

Vaillant devices talk to each other over eBUS, a two-wire bus between the controller, the heat pump and the boiler. The eBUS Adapter C6 connects to this bus and, with its micro-ebusd function, offers the values over a local HTTP interface. A community template for this path is now in the TapHome portal as a beta.

TapHome asks the adapter for each value about once a minute and writes setpoints back. The adapter reads and writes them on eBUS, so the Vaillant controller stays in charge of the heat pump.

Learn more

• EMS-ESP heat pump, the same kind of gateway for Bosch, Buderus and IVT heat pumps.
• Heating and cooling in the TapHome documentation.

Which Vaillant heat pump and controller do you have, and what would you like TapHome to do with it? Try the beta template and tell us in the comments how it works, vote for this idea and follow it for updates.