Support for multi-zone UFH manifolds
The current integration with underfloor systems appears to be limited to single zone systems without zone actuators. A lot of UFH system are UFH downstairs with radiators upstairs. The UFH system typically have more than one zone with actuators per zone and a shared pump.
Currently, I can get a multi-zone UFH management from one provider (e.g. the Heatmiser Neo system) and individual radiator control (e.g. tado). It would be good to have an integrated system. Therefore, do you have plans to release hardware for managing UFH manifolds? The existing wireless thermostat offering connected to such a hub would allow the user to create UFH zones which then opens the actuator for that zone, energises the UFH pump and signals for heat from the heat source. I think the hub would need to support up to 8 zones to cater for the majority of install sizes.
An example hub wiring is shown here: https://www.heatmiser.com/en/download/211/english/7486/uh8-rf-manual.pdf
The challenges here are:
- The UFH manifold has a shared pump, with actuators per zone. Therefore, 230V to one or more actuators needs to energise the pump. However, you don't want to accidently open all actuators by energising the pump.
- Modern heat sources will flow at different temperatures depending on the demand. For example flow at 50deg for UFH only demand and 70deg for DHW or Radiator demand. The wiring needs to account for this differentiation.
- If all the radiators have radiator thermostats, the system needs to call for heat when a radiator thermostat calls for heat and not rely on a central thermostat.