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You guys seem to be confusing the word 'expert' with 'well informed'. Of course I am not an expert in plumbing. I don't need to be. The fact that you mostly seem to think the TRVs are the only way to go, shows that you are stuck in your ways. Not many years ago, TRVs were an innovation and I'm...

'Trust you' is the last thing I would do, in the light of the limited knowledge you are showing. I know that when you lads have yet another failed piece of gear, you all agree it's total rubbish and the designer should be shot. But do you think you could do better at the price they build stuff...

There's not much point in continuing this but if you reckon that what you 'deem' worthwhile is the only stuff that's worth while learning then you have missed out on an awful lot of seriously important stuff. Where ignorance is bliss, 'tis folly to be wise. And you still can't help being...

Elegantly put - as a reason for doing everything by eye and making do with second best. Just because you don't understand the basics of control systems doesn't mean that the theory doesn't apply in homes, the same as in Motorcars, Power stations and the computer you use on this forum. Your...

Thanks for that. 0.4 vs 0.8K temperature influence is very interesting and surprising, if it really does mean what it seems to imply, then the air circulating near the sensor is dominating and that the conductivity of the case is very low. Differential pressure influence is presumably due to the...

If the "talking" is just statements with no supporting evidence then, apart from a nice bit of social, what does it achieve? I was advised to talk to the manufacturers and I am in the process of doing that. I am just surprised that guys don't appear to have done the same but rely on each others...

Professionals are paid every day for advice and some of the responses here have been from 'professionals'. A true professional, advances their knowledge on a daily basis. It's only fair to customers. I have never posted on this forum before but I am not surprised that others have been...

At last. A bit of sensed knowledge. Interesting information about the TRV 4, too! I would still appreciate some ideas as to the temperature variations in a room. A remote sensor could certainly respond much quicker than taking 20 minutes and the 'gain' in the feedback system would or could be as...

And using insulting language suddenly puts you in the right, does it? If people don't know the proper answer then why not say so? I imagine some of the contributors to this forum actually get paid for 'advising' people. Customers suffer and don't even realise it when the expert doesn't know his...

Well, that's fair enough for someone who doesn't care. People will put up with all sorts when they don't know better. My main problem is that I have a wood burner which puts out 5kW when it's working hard (with cheap fuel). I need the downstairs radiators to back off automatically, according to...

I should have thought that any 'expert' in the field would know. A car designer - or even just a well informed hobbyist would know the relevant figures on their car performance so why not a CH engineer? Central Heating Design is a branch of Engineering. In serious Engineering, a system is...

I not gonna recommend evo home with remote sensors? Do I suspect the budget might not meet the requirements. I am prepared to spend what's necessary to get the result I want. I would be interested to know what's wrong with evo home. Is it reliability of valves? I understand control theory and...

If someone could actually quote some performance figures then I would no longer be "ignorant". This is what bothers me; I have looked for a table or graph, showing the room temperature achieved in various situations with the same TRV setting and I can't find one. I am can't accept what's...

Thanks for replying. It would be nice if I could believe that but how can it be guaranteed, with the radiator right next to it and the hot water valve right underneath it? It must assume that the air circulation through the sensor is enough to make the room temperature dominate. With respect...

Your average TRV works by sensing the radiator water temperature (it's bolted to it, after all) and I need something that actually senses the room temperature, to respond to opening the door and whether or not the woodburner is alight. I don't want to go to the bother of Zones. What I think I...

Thank you for the responses so far, chaps. I do not, as yet, have an SE because the fewer questions I have to ask him and the fewer times I need to go through the loop, the cheaper it will be for me. In principle, I can't see any problem as the wall goes right down to the ground and...

My house is a late Victorian terrace. I plan to put in a loft extension and I want to get as much headroom up there as possible. Hence, I don't want the new joists to be any deeper than necessary. There is a single skin load bearing wall between back and front rooms. This supports the bedroom...