So I've just moved into a new 5 bed house, which is over two floors and has 2 heating zones (S-Plan Plus). The boiler is an OpenTherm boiler (Logic Heat h15) but the existing thermostats and timer (ESi) are not OpenTherm compatible.
My parents have moved in with us and my mother is home all day, so I thought that per-room zoning would be ideal for us. In the previous house we had a Nest, however when I queried them about multi-zone and OpenTherm compatibility, it looks like they can only do one or the other. My plan is now to use the EvoHome system, having a mix of smart TRVs and standard TRVs.
Currently there is a bedroom zone (Which includes an en-suite bathroom towel radiators) with its thermostat in the largest bedroom on the second floor and a zone for the rest of the rooms with its thermostat in the ground-floor hallway.
My plan was to put 6 smart TRVs (HR92) on the following radiators:
- Radiator in Bed 1 (Our room, largest bedroom on the second floor - There are no other rooms on this floor other than an en-suite)
- Main radiator in Bed 2 (Parent's room, second largest on the first floor - There is a second small radiator in this room but I was going to leave this with a standard TRV)
- Radiator in Bed 3 (Office space)
- Radiator in Bed 4 (Craft room for my mother)
- Main radiator in lounge (I'll leave the second radiator with a standard TRV)
- Kitchen (I'll leave the attached dining room radiator with a standard TRV)
The idea for rooms with more than one radiator is to use a HR92 on the largest radiator to allow the room to call for heat, but leave a standard TRV on the second radiator so that it just assists.
I was planning on using three relays (BDR91), one for each zone valve. (Including the hot water cylinder's zone valve) I'd also need the cylinder thermostat (ATF500DHW) which I don't believe has a relay output, hence the third zone valve.
In Bed 1 and 2, I was going to fit a wall-mounted thermostat (T87RF2059) to make adjustment easier.
The boiler would be controlled via the OpenTherm unit (R8810) - I don't believe it then needs any other signals, specifically the call for heat from the zone valves ?
Obviously I'd also get the main controller, wall mounted.
Does this setup sound right ? I don't want to spend this kind of money, only to find that it isn't going to work right for our needs.
Thanks,
-Andrew.
My parents have moved in with us and my mother is home all day, so I thought that per-room zoning would be ideal for us. In the previous house we had a Nest, however when I queried them about multi-zone and OpenTherm compatibility, it looks like they can only do one or the other. My plan is now to use the EvoHome system, having a mix of smart TRVs and standard TRVs.
Currently there is a bedroom zone (Which includes an en-suite bathroom towel radiators) with its thermostat in the largest bedroom on the second floor and a zone for the rest of the rooms with its thermostat in the ground-floor hallway.
My plan was to put 6 smart TRVs (HR92) on the following radiators:
- Radiator in Bed 1 (Our room, largest bedroom on the second floor - There are no other rooms on this floor other than an en-suite)
- Main radiator in Bed 2 (Parent's room, second largest on the first floor - There is a second small radiator in this room but I was going to leave this with a standard TRV)
- Radiator in Bed 3 (Office space)
- Radiator in Bed 4 (Craft room for my mother)
- Main radiator in lounge (I'll leave the second radiator with a standard TRV)
- Kitchen (I'll leave the attached dining room radiator with a standard TRV)
The idea for rooms with more than one radiator is to use a HR92 on the largest radiator to allow the room to call for heat, but leave a standard TRV on the second radiator so that it just assists.
I was planning on using three relays (BDR91), one for each zone valve. (Including the hot water cylinder's zone valve) I'd also need the cylinder thermostat (ATF500DHW) which I don't believe has a relay output, hence the third zone valve.
In Bed 1 and 2, I was going to fit a wall-mounted thermostat (T87RF2059) to make adjustment easier.
The boiler would be controlled via the OpenTherm unit (R8810) - I don't believe it then needs any other signals, specifically the call for heat from the zone valves ?
Obviously I'd also get the main controller, wall mounted.
Does this setup sound right ? I don't want to spend this kind of money, only to find that it isn't going to work right for our needs.
Thanks,
-Andrew.
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