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The heat loss of a 1930's three bed semi with solid walls is unlikely to be above 10kW at-3°C, probably a couple less. What type of property or demand do you have to require 18kW let alone 22-24kW?

What do you mean trends? I'm running my system configured WC, room stat sensor disabled so all the control app does is record room temp achieved by using the outside sensor only, no internal reference. I can configure it so the comfort temp. achieved when timer contacts are closed then, when...

If he doesn't understand it you have a real issue, he worships at the temple of the V200, a real disciple.

That situation is exactly what Viessmann says it prevents. If you're on Facebook join Heating System Design group and explain the situation, there are Viessmann experts residing there. Or try the HeatGeeks Heating help for home owners, similar thing.

Although not a huge fan of Viessmann and the 200's intricacies I think your boiler on its own can do exactly what you want. I am sure others have written elsewhere of it's ability to select 2 if not 3 temperatures between which you can switch on a time schedule embedded in the boiler. You...

OK, Carrier's and Riello's certainly do.

Heat pumps modulate compressor speed, and therefore output, too.

Don't take any notice of the video, the fellow is frustrated because he made some assumptions that were incorrect. The thermostat he is connecting is an Alpha model, you can see it on the box. (it IS part of the BesMART range but not the BeSMART control, it's an accessory). First he says...

Of course

Ok, the stat is compatible. Your gas safe engineer should have no problems wiring the stat in but you’ll need a connection box. I say gas safe engineer because you have to open a combustion cover now on this boiler and that shouldn’t be done by someone not competent to do the necessary safety...

Guys ask on social media for advice on a Compact but don’t say whether it’s a Compact, Compact SE, Compact A, it’s really frustrating. Same with easiheat

The reason I ask is that there is an easiheat C, an easiheat ci, and an easiheat i. Does it have a digital display and buttons left right and below the display. Picture? The 'i' is the latest but the factory made some more of the discontinued earlier C model recently because of demand...

Is it an easiest C or an easihrat-i?

Yes, it will work. Dependent on what wiring connections are supplied with the boiler it may just plug straight is if you want to use the control as an ON/OFF. If you want to convert the thermostat to OpenTherm you will need the controls interface, you will not need it otherwise.

Change the boiler and leave all the rest. In 40 years the vented system will have had a fraction of the maintenance that would have been required with an unvented system and performance would have been adequate or they would have changed it to unvented already. Unless there's another specific...

Speak to an expert contractor regarding AC, it's perfectly possible to have the condenser on the balcony and the internal unit supply hot water, a split system. I work for Vokera, part of the Carrier group which includes Toshiba AC. I've no expertise in AC personally. Ring Toshiba on 01372 220...

I'm told the smart heads are coming but know no more than that. I use Hi Comfort OpenTherm plus weather compensation wired to the boiler. It sounds like it might be the Vibe Max boiler as that came out around then.

What model Vokera is it? I have the Hi Comfort control, it works fine. Not the most intuitive to use or prettiest room control but there's no need to go to it with the Hi Comfort app. The predecessor, the BeSMART was excellent but let down by the servers in China which were incredibly...

It is that simple but I can't guarantee the evohome will control domestic hot water temperature. It didn't use to but HW may have updated it. You can definitely do what you want to, write back if there's an issue with DHW temperature. There's a workaround. 10 to 15% improvement is an internet...

If you see marks like this around CN5 you'll need a new PCB I'm afraid