SteamyTea

On one my houses had a external soil pipe. It froze up one winter.

Dump it in a quiet country lane, then inform the council that someone has fly tipped some asbestos. The council will then come along and arrange for it to be disposed of correctly. It will get paid for by increasing car park charges and closing public lavatories. Well that is what happens down here.

I worked this out once when our old mate Jeremy Harris was building his own diverter. Your point is the very point I raised. While it may be possible to not export a Wh, that does not heat up much titanium or Inconel. Titanium 520 kJ/kg.K and 22 W/m.K Inconel 460 kJ/kg.K and 6.5 W/m.K A Wh is 3.6 kJ So Titanium 0.007 K/kg Inconel 0.008 K/kg Now I have no idea how much metal is covering an element, 0.05 kg (50 g) maybe. So a rise in temperature of about 0.15 K. And that does not include the actual element or the insulation. (I think, I have a headache, one of those ones that is so bad I somehow jumped a red light earlier)

I found a fourth one. Way too much choice.

Not going to be any meaningful sun till may either. Have you added extra insulation to your DHW cylinder? Have you reduced the flow for showers? Have you reduced the cylinder temperature to as low as you can get away with? Those 3 could save you a bit.

Seems a lot. I have cut many meters of stone and slate with a single disk. I have used both and never noticed any difference. Did you check that it is really 10mm thick and that is not one of the spindle sizes?

Probably giving tax advice backstage. Don't stand to close to me with that giggle stick.

In Knotty Ash

Hard to tell, but looks like it had a knot in it, and a knot in tension. Or, a knot, not in compression.

That does rather make it a one trick pony though. If you have it grid tied, you can use excess production elsewhere in your house, and pay be paid a few quid for any exports (all rather depends how Octopus get on).

I don't know the model of boiler you have but suspect that it senses both the flow and return temperatures, if there is not much difference, then it shuts down. It may also do this on flow pressure, which probably increases. Is your boiler actually giving you problems?

That is when the first man with a shovel stops tunneling.

Civilisation comes to Bristol. All the poncy hipsters must have moved out.

You (expletive deleted)ing what. Bash Bash Bash

Going back to my 1970s SMP mathematics lessons, and the topic title question. 3PM

Don't ridge vents take care of that on a new roof?

Or

Over the rest of this decade. So 15k a year. That will sort out the housing crisis. Gove was on PM claiming that if all the measures proposed are enacted, then the rivers will have less nutrients in them. Also blamed the EU legacy legislation for the mess. But it is OK, we are delaying food tariffs from the EU, while our exports get charged it. I am so grateful that others voted for me to have my sovereignty back. Even if the sovereign has changed, which I did not vote for either. What a (expletive deleted) up of a government.

If it is Coldplay, end track.

I am looking forward to this saga. Any heating system is doomed to failure in this house.

I have a selection of angle grinders, one small cordless, a small one, a medium one with speed control and a very large one. The big boy scares the hell out of me when slicing concrete slabs up. The little one, 700 W, is very easy to use as it can be locked on, means one handed usage. But don't try using one up a ladder, when a cutting disc grabs, there is a lot of inertia in the disk, and even 700W is like pushing 700 kg a metre, in one second. So if you weigh 100 kg, you will have moved over a metre before you even have time to realise what has happened.

What else is going to move if you jack it up to where it is meant to be? @saveasteading and @Gus Potter are your men here, I will just suggest the glue to use.

Put a VCL in on the warm side. It is done and dusted then.

Impedance when AC, resistance when DC (I think). All to do with root mean squared values.

If you go the small inverter route, that make sure that the the load exceeds the inverter start up requirements. If you are going to the bother of installing modules and an inverter, why not go grid tied and then use a diverter to the DHW?