can I have a bit of advice please? Evohome
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I don't think you can have HR92's and Electric heating elements in the same zone in an Evohome config. When you create a zone you have to choose between "Radiator Controller" or "Electric heating zone" (or a few other choices) with no way to choose both. So I suspect the underfloor would have to be configured as a separate zone. You can of course schedule the two zones to have the same schedule, although it will eat into your 12 zone limit.Originally Posted by bigrw
Same problem here, two separate zones eating into your maximum zone limit of 12.In the garden room, which is to be tiled, I'm having electric underfloor and it has an open archway to the garden room which has a radiator and hr92. again, can I control all with evohome and can they link somehow?
If you have a hallway with both ground floor and first floor radiators in what is basically the same air space then yes, this shouldn't be difficult as you can have multiple radiators in the same zone and it still only counts as one zone and has one schedule.Finally, I was considering putting it in the entrance hall which is of course continuous with the landing and the stairs. there are rads up and downstairs. can I use it in some way just to have a nice warm floor for coming home?
Normally with a multiple radiator zone there is only one sensor - either a wall sensor, or one of the HR92's is nominated to be the temperature sensor for both radiators. However due to the height difference you'd probably find it was a lot hotter upstairs than on the landing, as the heat from both radiators would heat the landing (heat rises) but the top floor radiator would only heat the top floor. Regardless of which you chose as sensor you'd probably get a big temperature difference.
What I would probably do is configure the zone as a "multi-room zone" when creating it. This tells both HR92's to use their own internal temperature sensors. They share a schedule but measure and adjust themselves separately. So when your hallway schedule says 20C, both radiators will try to adjust themselves to achieve 20C on their floor. This will probably result in the ground floor radiator doing more work than the top floor one, but the end result should be an even temperature at both levels.
Can't see any reason why an HR92 can't control an old cast iron Radiator. If you can get a valve body with a fitting compatible with the HR92 it will control it. By default the HR92 supports M30x1.5 valve bodies so a M30x1.5mm valve body that is compatible with the cast iron radiator (1/2" pipe ?) would be the best option but adaptors are available for the HR92 to fit other fitting types.Cast iron rad:
I'm assured that the TRV will work with it. if it didn't, can you have a rad with a manual try in an evohome system. doesn't that mean heat would have to be running the whole time whereas if all the TRVs were off and all electric the boiler would know to switch off. sorry I'm totally clueless about this!!!
No piggybacking on wifi, no mesh repeating I'm afraid.finally, the boiler and tanks are going to be in the garage and because the place will be quite big when finished, I'm wondering if signal will be good enough all over the house. does it piggy back on normal wifi? I'll have two controllers because more than 12 zones, do they repeat and mesh in some way?
The controller is central to the system - every other device talks only to the controller so the controller should be centrally located for best signal preferably on a wall mount if the property is large. If you have two controllers you effectively have two independent systems in the house that just share a common boiler. The devices belonging to one controller will talk only to it, the devices belonging to the other controller will talk only to it. Generally only one controller will be responsible for hot water in a two controller system however if you have two separate cylinders that are under separate control you may want hot water control with both as each one can only control a single hot water cylinder.
If the property is large and some devices are in a garage signal strength could be an issue.
A large property with potential signal range/coverage issues and a dual controller installation would both really need someone who knows what they're doing with the installation as there could be some complications. Are you trying to install it yourself or do you have an Evohome aware installer doing the job ?
Yes it is getting a bit old now. I bought the Evohome wifi controller 3 1/2 years ago and it's still the current model. There have only been 2 or 3 minor firmware updates in that whole time.finally, finally, the system seems quite old now, are we due an upgrade and should I wait a few months before taking the plunge?
Nobody knows if/when the controller will be updated - we'd all like to know as well!
