Radiators on the wrong wall, ways around the problem?

[ericmark]

Radiators should really be on an internal wall, so when heating not running the temperature sampled would be repetitive of the general temperature in the room, but most of ours are on the external wall under the windows, once the heating is running this is OK, but it means when not running the TRV is colder than the general room, where the TRV is not linked this is not too much of a problem, but where it is linked to the hub so it can fire the boiler, it fires up the boiler when not required.

Today, middle of summer, showing 18.5ºC (Bedroom North Wall) which in winter would be considered cold, but thermostats in centre of rooms show 22.5ºC (Living room) and 24ºC (Hall) and we have fans running to keep us cool, not quite hot enough to turn on the AC, other TRV heads dining room under the bedroom also 18ºC, hall TRV head which is likely the most central point of house 19ºC and living room 22ºC and 20ºC two radiators both under windows.

The problem is the bedroom TRV head can activate the boiler, I have just turned the set point down to stop the boiler firing up, only option I can see, is to use a wall thermostat instead, but not sure how one then stops the TRV head from firing the central heating (Wiser) all other heads are not linked, so does not matter if they open and close, as boiler is off, but want bedroom set at 18ºC in winter, but don't want boiler firing in the summer.

I assume today radiators are fitted on internal walls, but this is an old house. And to move a radiator would be a massive job.

 

[avonmouth]

Why don't you just turn the heating off in summer ?

 

[Mister Banks]

Is this on your Wiser system? If so just add a Wiser room thermostat to the room. Or if you have the newer version Wiser hub add a cheap Wiser temperature/humidity sensor to the room.

 

[ericmark]

Oh, I am glad I asked, did not know the "Wiser temperature/humidity sensor" even existed. That does seem to be the way forward. Only installed last year, says Firmware Version 3.18.3, so what have I got?

 

[Mister Banks]

Oh, I am glad I asked, did not know the "Wiser temperature/humidity sensor" even existed. That does seem to be the way forward. Only installed last year, says Firmware Version 3.18.3, so what have I got?

You need a v2 hubr for temperature/humidity sensors to be supported. The new hubr was released a few weeks ago.

 

[ericmark]

Darn it, looks like a wall thermostat then, but can I set the TRV head, not to fire the boiler?

 

[Mister Banks]

Darn it, looks like a wall thermostat then, but can I set the TRV head, not to fire the boiler?

If you have a Wiser TRV in the same location/room as a Wiser room thermostat then the room thermostat takes over temperature control and requests for heat. The TRV is just used to open and close the radiator valve as instructed by the hubr.

 

[ericmark]

Thankyou.