What smart themostart are using?

sparkymark75 · 15 Jan 2023 at 12:25

squerble said:
There is a company (EPH) that does OpenTherm over two zones, though you'd go back to effectively "regular" thermostats on the wall again. If you happen to have an Ideal boiler, their own Halo Wi-Fi system also supports OpenTherm over two zones.

I do have an Ideal boiler as that's what the builders fitted when they built the house.

robj20 · 24 Jan 2023 at 16:54

squerble said:
There is a company (EPH) that does OpenTherm over two zones, though you'd go back to effectively "regular" thermostats on the wall again. If you happen to have an Ideal boiler, their own Halo Wi-Fi system also supports OpenTherm over two zones.

I have Opentherm over 7 zones with Evohome.

413x · 24 Jan 2023 at 17:13

photoshop said:
I use Tado

Each room has a TRV and a thermostat and i treat each room as a seperate zone.
Cost a fair bit to do but well worth it for the convienance.

I only have the stat in the big rooms. I find the small ones I find an offset on trv sufficient

squerble · 24 Jan 2023 at 18:10

robj20 said:
I have Opentherm over 7 zones with Evohome.

But is that "zones" created by electronic TRVs, or 7 actual physical systems controlled by zone valves?

robj20 · 24 Jan 2023 at 18:32

squerble said:
But is that "zones" created by electronic TRVs, or 7 actual physical systems controlled by zone valves?

Zero difference. Evohome didn't differentiate between TRVS and other valves they all show as just zone.

A single Opentherm bridge can support 4 Evohome controllers and each of those can control 12 zones. So Evohome at it's limit can have 48 Opentherm zones.

squerble · 24 Jan 2023 at 19:21

robj20 said:
Zero difference. Evohome didn't differentiate between TRVS and other valves they all show as just zone.

A single Opentherm bridge can support 4 Evohome controllers and each of those can control 12 zones. So Evohome at it's limit can have 48 Opentherm zones.

It makes a huge difference :cry:

when all of the heating is a single system it just needs to run the pump and open TRVs where needed - the whole system runs at one temperature (as requested by OpenTherm); when the system is physically split by zone valves, then the controllers must be able to open the zone valve that has a radiator calling for heat on it.

You're telling me each of the Evohome controllers has wiring for 12 zone valves? I very much doubt it.

robj20 · 24 Jan 2023 at 20:29

squerble said:
It makes a huge difference when all of the heating is a single system it just needs to run the pump and open TRVs where needed - the whole system runs at one temperature (as requested by OpenTherm); when the system is physically split by zone valves, then the controllers must be able to open the zone valve that has a radiator calling for heat on it.

You're telling me each of the Evohome controllers has wiring for 12 zone valves? I very much doubt it.

I am telling you it can have 12 zones on each controller. It's not some crappy nest system.
You simply need to pair either a relay which can control a zone valve or a trv and that's your zone, each zone had both a relay and a thermostat, either the trv or a separate one you can stick on the wall.
When I go into my menus it shows each zone and it's demand, the controller then converts this into a temperature request to the Opentherm relay connected to the boiler. Simple.

Believe me, don't believe me makes no difference to me.

tsobo · 27 Jan 2023 at 10:28

I went with hive in the end and will gradually buy the TRV‘s overtime.

tsobo · 14 Feb 2023 at 18:40

Hi guys,just a bit of an update. Managed to install professionally my hive system and it's been amazing. Just the thought of having control over my heating is very reassuring,and hopefully I can lower my heating bills. Now I have managed to install some trvs and have hit a snag with the towel rails. Mine have the valves upside down, so I would have to fit the radiator valves upside down. Now hive recommend these shouldn't be installed upside down,but I really want to control these as I have 5 bathroom and mine run off both the gas and hot water. Ideally I just want to control them so they're on in the morning. Has anyone installed them upside down in the towel rail?any issues?