Consider a typical higher end TRV such as a Tado X which is directly talking to a HA Green Hub, rather than talking through its proprietary (e.g.Tado) hub and/or app. How do I command the boiler on and off?
If the TRV reports back “I have reached the set temperature( and thus closed the valve)” and all the TRVs that are currently set to be on also report it, the Hub can tell the boiler to go off. Or it can be done if the TRVs report back their current temperatures and the Hub compares this with the set ones and decides all set temperatres are reached.
Do standard schedulers and TRV integrations have this communication ability and logic?
Otherwise rhe boiler will just carry on running for as long as those zones are set on and just feed the one radiator that has no TRV, which I don’t want.
My suggestion is not a TRV.
The ones we had was very loud and unreliable.
Sometimes they didn’t close, sometimes they closed partially, battery issues, and very loud (because of the grinding on the pin).
I replaced them all with thermal actuators that is mains powered and completely silent.
Here is three years of heating.
The bar chart is our consumption, and the line is the average of all apartments.
On the left is without any smart things.
The middle one is with the TRVs.
The right one is with the thermal actuators.
Since they turn off the radiators when we leave and close when they should close the consumption is less than the average in the 54 apartments. 8 of them are the size we have (four rooms), most of them are 1 or 2 room apartments.
Thanks for that but thermal actuators may be difficult for us due to a mains supply being lacking near some radiators.
I have simple electronic TRVs at home and they are a bit noisy but would not matter in the new application i am designing.
I have not found my TRVs (2 brands) unreliable as long as the batteries are replaced yearly. And they are not knocked. The plasic adapters often used beteen the TRV and the valve are not strong against being knocked.
