I current have a Drayton Wiser system comprising of a dozen or so iTRVs on radiators and a single room thermostat for my front room. I have recently installed a new kitchen and want to heat it with one of these under plinth heaters.
They are a wet heater in that water travels through them from the heating system and then upon detecting the hot water, a fan comes on to blow heat out.
My question is about the best way to control these using the drayton wiser system. I think controlling water flow is the only real way to do this which to me involves adding an iTRV to the plinth heater, treating it as a conventional radiator, as well as a room thermostat to actually control the temperature (i dont think the iTRV will do a good job under the counter as the heat differential between the room and under the counter could be quite a bit). I know from my current setup that the room stat takes priority and will close off or open the iTRV depending on the temp it sees.
The downside of course is that the iTRVs are battery powered so access under the cabinets will be a pain.
Is there a better option? A simple wifi REST/MQTT solenoid valve would do the same thing i think, and i can integrate through HA and the wiser integration. Not sure where to look for something like this.
I did look at this, but the only problem is that this will only control the electrical fan side of things. I wasn’t sure if i wanted the heater receiving hot water flow from the boiler when it wasn’t actually required. Its quite a long run and would be a bit of a waste of energy - water would flow to it if any other radiator in the system was calling for heat and then it would just do nothing with that heat, hence stopping the flow appeared to be a better solution if possible.
EDIT - i see what you mean… use this instead of a shelly… good thinking
I have one of these in my kitchen but bought the smart version. I also have a radiator with a trv in the kitchen along with a roomstat but I think how i am doing it will also work without that.
The smart version integrates with tuya and i just have an automation that keeps the target temp aligned to the target temp of the roomstat. The only pain is the second thermostat module that comes with it and having to locate that too.
Edit: if you already have it and too late to opt for smart one, just control its power with a shelly or something and automate with HA to turn on when roomstat is demanding heat.
The wiser integration has automation triggers for starts and stops heating for a room to drive this.
