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I have just turned down a quote for a replacement boiler and I regret having to do so as I was confident that the installer would have done a first-class job. My question is this: The installer has assessed that it will take 4 days to do all the work. (I have no reason to doubt his assessment...

Just a further thought from the depths of my old mind. If the CH motorised valve is disabled/open or removed, then surely multi-zoning doesn't come into play? Is this a way around the Intergas/Evohome issue?

Eek. At this point, I am beginning to wonder whether the Eco Rf plus weather compensation with control via BDRs is a more sensible option? Given the savings that I am already accruing from Evohome, any additional savings will primarily be the result of a more efficient boiler. Thanks again for...

Knowledge is power. I hadn't appreciated that configuration of the Eco Rf in this way was possible. Will it work with 'S' plan or am I into a system reconfiguration? How will the boiler firmware be updated to solve the current Evohome/Opentherm multi-zoning issues? Sorry to ask so many questions...

As I have an Oso 250L unvented cylinder, I think that the boiler that I would need would be the Intergas Compact HRE SB.

Thanks Dan. When you say 'in progress' any idea of the likely timescale? Any known problems with Atag and Evohome Opentherm?

I installed Evohome over 2 years ago. I am now looking to replace a 16 year old boiler with either a Viessmann, ATag or Intergas product using an Opentherm connection. I know that the Viessmann 100 needs a HW junction box for HW priority; the Atag needs an EBus to Opentherm converter and...

This might help. You can sign up as an individual: http://youlearn.honeywelluk.com/courses I have a conventional boiler in an 'S' plan configuration with an unvented cylinder. To keep things simple, I have retained both motorised valves which are connected to 2 BDRs in the airing cupboard...

Have a look at the Automated Home website: there are many, very happy users of the Evohome system. My advice would be to look for a plumber that is an accredited Honeywell Connected specialist. Without training, the average plumber is unlikely to understand some of the potential installation...

Thanks Mike - I might just do that.

That's not how the guys at Honeywell UK see it but they would be in favour of it - wouldn't they.

Evohome replaced the conventional timer, hall stat and manual TRVs in my home and we are saving just under 20% per year in gas usage with the added advantage of heat when and where we want it. As each HR92 demands heat it does operate the zone valve and activate the boiler (that said, the zone...

What, if any, are the benefits of mixing Evohome and a boiler with weather compensation? I appreciate that it could be argued that Evohome zone optimisation and weather compensation are very much the same thing but with different solutions.

Thanks all. i appreciate your thoughts.

Thanks - that's helpful.

I would be grateful for some thoughts/advice. I am looking to replace an Ideal Classic FF280 boiler with 'S' Plan connections. HW is via an unvented 250L OSO cylinder. My property comprises 5 beds, 2 ensuite, a bathroom, and 21 radiators. The heating system is divided into 12 Evohome zones and...

Let me try and help the OP. I installed Evohome nearly 2 years ago with TRVs on all radiators along with the HW kit. Firstly, it is possible to build the system; however, the disadvantage of having a combination of HR92s and manual TRVs is that the rooms with manual TRVs will always come on...