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Clamp on cylinder stats are liable to fall off, causing the cylinder to overheat. You'd have the immersion thermostat set to the higher temperature, but that still leaves you with a scald hazard, unless there are TMVs fitted. You shouldn't try to by-pass the immersion thermostat, not ever.

[/url] AS with the BEM device it replaced, IF fitted to a non-condensing boiler, THEN the installation must include a means of maintaining the boiler return temperature above 56 degC (mixing valve, shunt pump, etc., ) or the boiler will be killed by corrosion within a year or two. It...

Probably, but we'll never know for sure and the landlord or gas fitter won't tell us. The Gas Safe man had to trace the source of the leak and fix it. I'd suspect he had a gas detector or leak detection fluid about his person, found a leak and then dismantled the back boiler to fix it...

That is not what they say at all. The 2 minute leak test is to see if there is a leak that exceeds the permissible limits. So, you might have a gas installation that passes that test (leak below permissible limit OR no detectable leakage) and which causes a smell of gas on random occasions...

+2. That happened to me, when the supplier did some repair to the service pipe serving my property. I had turned off the mains stopcock when they isolated the supply, anticipating a load of silt. When I turned it on, I should have isolated the riser and flushed out the service pipe through...

It was; I can't write filter and flow in the same sentence.

He put a filter on the return? Seems restrained, IMHO.

It goes on the return, to protect the boiler. The boiler is catching crud and protecting the filter. get him back. It's not your fault he was a dullard. The trade does seem to attract them.

No idea; I think it makes more noise in other frequency ranges. It may be how the electronic gizmo converts ultra-sonic to an audible sound. Half-a-bar is adequate for all practical purposes.

Ultra-sonic; I've got one and it does work, in some cases. It is astonishingly effective for steam or compressed air leaks in plant-rooms, where the sound produced by the leak can be detected despite the background noise. You'd need to blow all the water out of the low-lying sections of...

There is, but the Water Regulations prohibit a direct connection between the mains and a heating system, except where there is an appropriate back-flow prevention. In this case the device required is a reduced pressure zone valve, that has to be installed and commissioned by someone with the...

Cynic that I am, I doubt it. The last few projects I was involved in had no windows. so it's not news that greatly excites me.

You didn't answer the question. Where will the coldest air be? In which direction will it move? There's nothing good about sliced bread. It was a backwards step by people who don't know a good loaf and who can't sharpen a dull knife. .. said the man who doesn't believe in convection.

It looks like a Gurney stove. Seriously, why would anyone put that in their house, it's neither radiator nor convector, takes up a whole wall and looks like a half-baked imitation of a sectional cast-iron radiator. It's quite simple, Norcon. You have a heat source on one wall and a heat...

How do you know that? Do you live in one? Have you put temperature sensors and anemometers in one, during winter, to monitor draughts? Whilst you have derided my "desk jockey" role, I do, at least, know when I do not know something and have the integrity to cheerfully admit it...

You're quite right about plumbing new builds (other than my own); I designed a few though. I sort of packed up the plumbing work when my career & qualifications took me into other areas. The Coanda effect is more relevant to the throw of air diffusers, so a plumber installing domestic...

Quite. So, IF they'd said something to the effect that; 'radiators were/are traditionally placed under windows because (insert relevant reasons here)' and then measured low/high level draughts and/or air temperature distribution at representative points in the room for single/ double/...

No ****, Sherlock. It makes no mention of the very valid reasons for placing heat emitters under windows, despite the increased heat losses. The alternative, the convective conveyor belt, does seem to be a most efficient means of moving heat from the radiator to the external wall, with...

Not for the de-hum & re-heat, nor any local re-heater batteries.