Struggling with Smart Thermostats and full Open Therm integration

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7 Feb 2024
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London
It seems OpenTherm updated their tech in 2021 which mean’s Drayton Wiser kit 1 for combi boilers do not support it. I'm trying to decide which smart thermostat to purchase to obtain the full benefits of Open Therm

Hive doesn’t support OpenTherm

Tado - OpenTherm protocol expects a hot water temperature to be sent from the controller does Tado do this? I know Drayton doesn’tWhich leaves the EU version 3 Tado. Has anyone used them? What’s your view? Do you recommend?

Nest - According to a previous post on here 'it doesn't appear that Nest TRVs can control the boiler ... they only appear to be able to control the flow in each radiator. So, for example, when the living room is warm enough, because it has been heated throughout the day and he wants to heat the bedroom just before hitting the sack, or just before getting up, the Nest TRV can't turn the boiler on by itself.
 
Have you contacted Drayton Wiser about this? They still advertise that they support OpenTherm which would be dubious if they haven’t / weren’t planning to upgrade this.
 
I have drayton wiser wired up with opentherm and its working fine (afaik)

to be fair from what I read opentherm doesn't make that much difference in the real world.
 
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