SteamyTea

Would the losses of having a small area of reduced insulation make much difference, thermally. As it is a pipe, there is only a very small area on the upper facing area, and it is mainly full of air, which is a good insulator. Try modelling it and see what the numbers say.

Oddly enough, it doesn't. Now that may sound controversial but it is to do with fluid dynamics, which are often categorised by a Reynold's Number, which is a unitless descriptor. Another way to think about it is not by the volumes being moved, but the masses moved. Reynold's Numbers tend to be big, Air is around 1500 and water around 1000. This does not imply a 50% difference and temperature and pressure make a huge difference, as does turbulent or laminar flow (pipe size and shape). That is a very brief, and simplified explanation, fluid dynamics is a horribly complex area of science/engineering. Apart from that, I can't help, but it probably explains the odd numbers quoted.

Was it that cheap, I can't remember. I think electricity was about 5p/kWh 1981 was the start of a recession, and we had had high inflation during the 'winter of discontent'. I opted out, rented out my home and went back to university.

It is on BBC Youtube Channel, not iPlayer.

When I shared a student flat in the 1980's, had a flat mate that played his clarinet in the bathroom. Anything that drowns out the sound of Baker Street is more than a bonus.

Yes, more than you think. Insulation follows an inverse rule. So say uninsured that the losses are 1 W.m-2.K-1 and 5mm of insulation reduced that to 0.8. The next 5mm will only reduce it to 0.64, not 0.6, next 5mm to 0.512. So even a small amount is worth it. It can also affect the condensation point, which can be problematic around windows.

Won't that, in part, negate what the resilience bars do?

Is that also known as a reed bed system, or is that something else again. I quite like the idea of my waste going through a treatment plant (having seen inside one, they don't seem very complicated, a bucket with an air bubbler in it) and then into a hole in the ground with some damp living plants growing out the top. Must be more to it than that.

I thought it meant we could not go skinny dipping: no swimming between red flags.

Yes, I think total capacity is the important part. Less washes needed. Think it is the mass of laundry. Water needed to be replaced as the soap powder has to be washed out. I recently got so decarboniser for work, it is mixed with water and you dump the blackened pots, pans and grills in it. Looked at the chemicals in it for the COSHH file, same stuff as washing powder. Worth knowing if you have a blackened kitchen tool.

I heard you used to be a gynaecologist, until you got caught.

It is pennies difference. My Bosch uses between 30 litres and 110 litres, with temperatures ranging from between 30°C and 60°C. It can also take up to 9 kg of load. So taking the worse case, cottons at 60°C, max load of 9kg, the manual says it uses 1.75 kWh. So even at my day rate, that is about 61p. As I usually run it at night, it is 25p. On the mixed load 40°C setting, which can take up to 4 kg, it uses 0.64 kWh. So either 23p or 9p. I usually use the 'speed perfect' setting at 30°C and I seem to remember that it uses 0.3 kWh. So 11p or 4p. So really, washing machines are pretty good. The big saving is is not using a tumble dryer. I am on my second Poundland washing line (I still have some left from the second one I bought), so that has cost be 10p/year. Just thought that at about £8/m3 for water and waste, the small, 30 litre wash costs 24p. Have I ever mentioned that we have the most expensive water in the country, which will also make it one of the most expensive in the world.

That will be 3,628,800 Factorials are used a lot in statistics. Spot on. This makes the choice of, number of, fitting of bolt important. Bolts are not screws. Though screws could be designed to be used here. Railway lines have to be tightened and loosened for seasonal temperature variations. This has come about as they don't have joints every few tens of meters.

Does this shed any light on it? https://www.newbuildinspections.com/wp-content/uploads/2024/07/NHBC-Standards-2024-4-2-Building-Near-Trees.pdf

A daily wallow is my luxury. Along with driving, coffees out and general time wasting.