If your lounge/dining/kitchen are in effect one room then the radiators would be better controlled by a Wiser room thermostat. Having 2 radiators in the same room on their own schedule could result in one radiator coming on more frequently and in effect working the boiler harder.
coincidently Iāve been looking at something similar over the last few weeks as winter is setting in. I have iTRVs in every room but also have 1 room stat in the middle of my house.
Would I be right in thinking that setting a schedule for the room thermostat by itself would control all theTRVs in the house? Iāve tried it but not sure itās working properly?
TLDR does the room stat control all the TRVs, or do they all have to be part of the schedule?
You need to allocate the room thermostat and all the iTRVās to the same room and then create a schedule for that room. The room thermostat will then control all the iTRVās.
This is an expensive option though as i believe you could do the same thing by using just the Wiser room thermostat with manual TRVās on all radiators. You then benefit by the individual TRVās acting as temperature limiters if you want some locations at slightly different temperatures, i.e upstairs and downstairs.
Ok thanks for confirming. Like I said I have wiser TRVs in all rooms already but was hoping to try a different approach to heating the house this winter
I would synchronize rads so that a āgroupā all come up/off together.
e.g. 5-9pm heat living room, kichen, lounge,hallway all to 20c
We kinda do that at the momentā¦
The issue with that is the radiators will likely not all come on together. The Wiser TRVās are location dependant i.e inside wall, outside wall, behind furniture, in a corner etc. and hence react differently. What then happens is a radiator is on and ends up trying to heat a space that needs 2 radiators resulting in the boiler cycling.
that is trueā¦
We have two rads in the corridor which are on simple TRVs and not Wiser so that if any radiator in the house calls for heat then these heatā¦
Maybe we should just go back to two wall thermostats for the entire houseā¦ upstairs and downā¦
These smart thermostats arenāt actually that smart. The Wiser thermostats could be much better if only Schneider would develop them, and the Wiser app, more. Itās, clear based on this HA integration, that the system has more capability so why arent Schneider taking advantage by making these capabilities available in the app. Having said all that i dont believe micro-zoning heating systems is a good idea.
I agree, in my old house microzoning worked really well. It was a mid terrace, well insulated houseā¦
in the new house (currently under massive renovation) , it works terriblyā¦ Im using what I call āMacro Zonesā, I group together a whole collection of rads into one preset (e.g. downstairs 21C)
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Hi, I am considering purchasing some Drayton Wiser kit but I am torn between using this great integration with a standard setup or getting the TRVs and Receiver to join my Zigbee network and automate it in HA.
Pros for standard and Integration
- Its standard so will get Drayton Wiser features and support
- It wonāt be dependent on HA to work
- the integration has many great features in it to expose it through HA (e.g. the schedule)
Pros for using my Zigbee network and HA Automation
- My Zigbee network extender devices will work with the TRVs preventing the need to purchase 3 or 4 DW plugs
- Reduce the chance of possible network channel clashes
- Greater control - I can automate exactly how it works by choosing to use room thermometers as thermostats in HA to control the valves.
That last point is to try to resolve the constant issue with TRV temps not reflecting the room temp.
However, it isnāt as easy as I hoped. I have a DW TRV connected via Z2M but I canāt set the position of the valve using pi_heating_demand as it is read only. I could instead put in some logic that compares the room temp to valve temp and boosts the set point if needed - but then I guess I could do that anyway using the integration?
Have anyone else worked out an elegant way of resolving this issue?
The Wiser devices do not work great with Z2M as far as I am aware. Others will be able to advise on their attempts to do so, but I believe all of them failed to get them working reliably and everyone here uses this excellent integration for that reason.
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Thanks. Mine actually seems to be working pretty well. Some things arenāt great - for some reason I get all of the HVAC modes in the HA Thermostat and they donāt seem to do anything (Off doesnāt turn it off, I have to set the temp to 5C):
Is that because as @robertwigley says they donāt work great with Z2M?
However I havenāt tried with either Z2M or ZHA as this integration works perfectly without them. I do use both zigbee integrations but have had no reason to use them with Wiser.
Why would you?
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Wiser has some proprietary handshake mechanisms preventing working on Zigbee network directly. Iāve spent hours trying things on Z2M - iTRV seems to work OK initially, but becomes less and less responsive and eventually stops responding. If memory serves right it happens within 24-48 hours.
If you want to go pure Zigbee youāll have to find some other TRVs
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Another point is that everything works fine with HA and with the Wiser Home app.
The Wiser integration is plug and work, and reliable, we donāt need any special knowledge to deal with.
My HA hardware failed a few days ago ( as I was not at home) and I have kept controlling my home with the wiser box and the wiser appā¦
Ah, thatās interesting - Iāll keep an eye out for that - thanks.
@Duke_box , @LGO44 , thanks, yes I cover the benefit of not being dependant on HA in my Pros.
However, the benefit of using Zigbee is that I can build a hybrid system just the way I want: I can use Hive SCRs say, I can use a mixture of TRVs, I can even use valves and thermometers. Itās the flexibility - but that would come at the cost of reliability!
But the most important thing to me would be the ability to use an external thermometer instead of the valveās thermometer - has anyone managed to do anything like that?
Thatās what the Room Thermostats are for. Granted they are ridiculously expensive and we have been asking Drayton for a cheaper screenless one for quite some time.
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You dream it and Schneider make It.
This product already exist in Europe, sorry for UK, with the hub V2.
some information in french, https://www.maison-energy.com/domotique-R40/cct593012-M177674.html
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Yes, I know. Thatās the most annoying thing. It already exists, but doesnāt work with our Gen1 hub in the UK. 