SteamyTea

That would still be an increase in installed systems though. This does seems a bit peculiar, but then our tax system is. It really does need a total rethink instead of this sticking plaster approach.

Considering that PV systems are now at least a 1/3rd of the price they were 8 years ago. Sales since Jan 2016 have been fairly steady.

When they got rid of new car tax, car prices stayed the same. Many things are sold on a price point. So probably won't make much difference.

Isn't 3/4 the bore of the pipe. I have never really understood plumbing fittings.

The kWh is a unit of energy that us used to buy energy in. It is what the numbers on an electric meter are. Look at your electric bill and you will see kWh Think of it as the number of gallons (even though we pay for it in litres) your fuel tank holds. Lots of gallons go further (the input knob turned to full).

Cheers @joe90 May use that as an example of 'thermal mass'

Because by looking at extremes it can be helpful to the bigger picture. Because they look at the rate of increase or decrease in numbers and it is helpful to the bigger picture. Can you answer this?

While I think of it, do you know the U-Value of your roof, is there insulation between the upstairs ceiling the the loft floor?

Bit of a different issue. But I think most BCO would spot the difference between bricks and cardboard. They also rely on the integrity of professional bodies and leave it up to the owner/builder to sue for damages.

@epsilonGreedy You are showing just one area of the globe there, and an extreme environment as well. If you constantly go looking for the outliers then you are just reinforcing your biases. There was a study a few years back about some glaciers that had increased in length and volume. This was used as proof that climate change was not happen, in fact I think they stated that it showed cooling. It was soon pointed out that in this special case, there was more rainfall in the region. Rainfall goes up when the world is warmer. It just happened to be dumped on those 4 glaciers because of the local weather patterns. There is a reason why we use different words for weather and climate. You really need to ask yourself what you are trying to prove here.

I have a picture for sales called 6°F. Only one person has commented on its meaning. She did not buy it.

Part of it is legislation. We are told what we can and can't use and what quality standards to work to.

I tend to live in my kitchen, not sat on my sofa for years now. Last year I did heat the house during the winter because I am getting weedy. Though the heating is only two storage heater with a combined maximum capacity of 22.5 kWh/day. My biggest usage is DHW, but that is because I like a bath, a deep one, every day, sometimes twice a day.

Or about a quarter of what I pay on a m2 basis. Small houses look terrible on paper and are even worse to live in.

Does show that designing in PV from the very beginning is worthwhile.

Just basic physics really. Treat it as such and the rest falls into place.

I have never had a satisfactory answer to that. Excluding the combined cylinder/header tank ones, where you tend to heat the cold store with waste heat from the main cylinder, the physics is the same. One reason given is that there are losses though the pipework, but I find that a bit dodgy as pipework should be sufficiently insulated.

Perversely, if I used more DHW, my losses would be lower. It is a quirk of Economy 7. One thing I did several years ago was to limit my E7 window to the last 3 or 4 hours of the period. This stopped the cylinder sitting there at maximum temperature while I slept. He had a combined DHW cylinder and header tank, so rather hard to reduce losses. I just have a bog standard vented cylinder, so the losses should be about the same as an unvented one (assuming similar shape, size, insulation levels and temperature range).

I think they test in a slightly peculiar way. They start with a cold cylinder, heat it up, run some water off, which refills the tank with cold water. While measuring the heat loss. So basically they are testing the lower thermal value of the heat loss, not the highest thermal value. So in effect they are measuring a temperature difference of about 10 to 15 °C rather than 35 °C. All a bit a cheat as it does not take into account issues like Economy 7 heating where the cylinder may be unused for 18 hours. @JSHarrisknows a bit more about the testing standard. I measured my DHW losses a while back (I measure everything I can) and regardless of which method I used, I always had very high losses, in the order of 3.5 kWh/day. My DHW usage was around 1.5 kWh/day. I added a lot of extra insulation and got it down to a more reasonable 1 to 1.5 kWh/day, but that is really still too high.

I have a picture for sale called 6°F. Only one person has commented on its meaning. She did not buy it.

I have now learnt a new term. Gish gallop = talking bollocks

You can treat it like any other heat loss problem as long as you know the surface area of the cylinder, the thickness and conductivity of the insulation, the temperature of the stored water and the temperature of the room. Just a bit of arithmetic. Who initially plumbed it in to the main cold tap. Sounds like a bad installation. My Mother lives in a hard water area, she, at 90, can top up the softer with salt.

Except they were in the Monday Club. The Monday Club was for the builders that got so drunk on the weekend they were not capable of turning up on Mondays. So they met in the pub Monday lunchtime. Or maybe that was just High Wycombe builders.

It was non global, just a local event. There wasn't one, never was. It was misinformation by climate change deniers. This was more a wet period rather than a warm period. Quite often done before the data is released, but can easily be checked up on. Rather a clutching at straws argument as we have satellite data as well as many more weather stations. It does if it has already been answered. I had a girlfriend that would keep asking the same question, but with different words, until she got the answer she wanted. The final answer to her was 'I think we should go our separate ways'.

Except Heat is the old term for Energy. Why we use terms like kWhh and kWhe Could stick a thermometer in one, or an energy meter. I can see what you are getting at, I had a car that had a broken fuel gauge once. I found that out when I ran out of fuel. I think this is why the newer storage heaters have more sophisticated controls, they make it easier to understand what is happening. This is really historic and came about in the 1950's and 60's, a time before microprocessors. There was also an idea that the countries nuclear power stations would deliver electricity that was 'to cheap to meter'. Life don't turn out like we imagine.