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Those metal bars are thinner than the ones normally used for door handles. Maybe those fittings increase them to the standard size, in case you need compatibility with something?Just a guess.

I'm writing this in the hope that it will be useful for any readers who have a business website and forward emails from that website domain to another email system (e.g. gmail, etc). There is a danger that you can lose emails (and customers!) in this case. For this example, say you have an...

Nonsense, it will generate some fraction of 14 W of heat, which is certainly noticeable. Is that quote from "AI"? FFS, we're all doomed. Probably true. Well that's fixable! Edit: maybe we can excuse the AI if it doesn't understand that the "plug" is actually the power supply, rather than...

Anyone want to come to Edinburgh to fit one?

Not an "air block", just some big blob of gunge.

Maybe have a look in 6 months, and see if they expand/contract with the seasons.

That can be fixed with duck tape or some other bodgery.

There have been a few posts over the last couple of years recommending the Vokera Pinnacle. Do we all still like it, or is there a new favourite now? Specifically, I'm looking for a combi that: - Will heat a 3-bed flat. (Old boiler is 28 kW.) - Can work efficiently when it's only heating one...

If you have a wet-and-dry vacuum, remove the trap and suck the downstream pipe.

Would be crazy not to insulate if you're removing the floor anyway, right?

High impedance in the earth wire. Likely floating, i.e. not connected to anything. You're only seeing a voltage because your meter has a high input impedance and there is capacitive coupling. With the power off, you need to use your multimeter to measure the resistance between the earth...

Why do you say that? He has measured the flow rate and it seems reasonable to me.

I think that means that it already has a polyx-like treatment applied, so you do not need to apply more - but in the future, you could potentially apply something of that sort to “top up” the finish. But I’m not an expert!

No. (And neither would you treat wood with polyx oil if it is supplied lacquered, for example. It is applied to raw wood.) Note that some of your questions above (e.g. about underlay) should be answered by reading the flooring manufacturer's instructions - and then checking with the experts...

Nice little insulated door for my outside tap and socket isolators:

Right.... Get a thermometer that you can use to measure the water temperature.

5 litres per minute. Say it's a 10 kW heater. Each litre of water receives 12 x 10 kJ =120 kJ of energy. Specific heat capacity of water is about 4 kJ / kg K (and a litre of water has a mass of 1 kg) so the temperature will be raised by 120 / 4 = 30 degrees. Say the incoming temperature is 15...

Can you try to measure the flow rate? I.e. time how long it takes to fill a jug, or something. Try to measure this with the temperature knob in a few different positions. What should happen is that when you turn the temperature knob to cooler, the flow rate increases - since the energy input is...

Why not use whatever finish your floor has?

On some of these locks, the key can only be fully inserted when the thumb-turn is in its neutral position, probably vertical.