SteamyTea

All fag packets are black now.

Feck, where was he when I got our flat roof GRP'd? Don't know, may have been in Weymouth.

That has to be sorted first. Then look and deal with the fraudsters.

Not as simple as that if Denominator is a variable.

Have a word with @craig, he gives good advice.

Why not go for 60 minutes or better if you can. Sometimes minimum standards are a hazard in themselves.

Wonder if they mean an efficiency of 125% at 55⁰ C output. Most probably the 12 year old in the publicity department misunderstood what was given to them.

Think I get about 70Gb for a tenner. And faster than the landline.

I think my phone uses 43. I find my phone works most places, so may be a cheap option.

He had not read this then; https://metro.co.uk/2008/08/15/teen-breaks-legs-in-cave-rave-collapse-383734/

Good, professional report that. Don't burn wet wood in an open fire.

Too right. Why knowing what the heat load of the building, at the start of a project, is so important. Sometimes I think they need to put a digital display on a roll of mineral wool insulation. Make it a bit more 21st Century.

But is it worth the cost of a diverter?

How does that solve the problem of a poorly insulated house with high air leakage? Insulation and airthghness does not need to cost a fortune, though it often takes time and can be messy.

Did you see the bit that it was a bunch of Manchurian academics that names it after the slang term for clothing.

A TOG is equal to 0.1 m2.K/W. To get to the nicer to understand U-Value, inverse it. U = 1/RSI

Less fatal

Our log saunas has long coach bolts that were used to tighten up the logs every few weeks when they were first installed. Obviously airtightness was not the main concern with a sauna, but it was not unusual to have a 100°C temperature difference.

Popular in South Africa in the 70s and 80s, trade embargo or no.

I have a sunbed kicking about, moved house with me a few times. Great for warming up on, and you get a tan. Probably delivers around 1 kW/m2. No reason it cannot be wall or ceiling mounted.

https://en.wikipedia.org/wiki/Boolean_algebra

'doveryay, no proveryay'

Says all you need to know really. If IR was a viable option, ten we would all be using it.

Even though the WHO said there is no safe level. The other, more important thing is, none of us know what your local particulate levels are. Basing health decisions on how one likes to think they are, and what they really are, is a recipe for disaster. They can do isotope testing to establish where they come from, but that is expensive. You are right, they do not now if one chemical base is worse than another, which leads onto this There are two affects, one from the physical size, which can pass though cell walls, and then the chemical reactions, which are amplified by the surface area. This is a well written article. https://www.bbc.com/future/article/20191113-the-toxic-killers-in-our-air-too-small-to-see One of the problems with medical research is people, we are all a little bit different. Some things are near enough certain i.e. 100m fall onto a concrete slab will be fatal. Other things less so i.e. exposure to the influenza virus, fatal for a few, unnoticed by a few, the 70% in the middle will have symptoms that range from a slight sniffle and a mild headache to quite sever illness that requires hospitalisation and technical medical intervention. One of the problems with associating one cause to one illness in one person is very difficult and is usually what a Coroner has to do in mysterious deaths. Luckily we have epidemiologists that are trained to spot true patterns in data and work out the most likely cause, even if the mechanism isn't fully understood. We can thank Florence Nightingale for this, she was very good at presenting data showing that more solders died of infection than injury, even though the cause of the infection was not fully understood, and at the time, antibiotics were unavailable. We are probably at this stage with particulates, but luckily we have much better data and analytical techniques these days, so getting the scientific truth is generally quicker. Google Scholar is pretty good for finding research, I just did a simple search for PM2.5 between 1980 and 1990, 644 results. 1990 to 2000, 8430 results 2000 to 2010, 32,300 results 2010 to 2020 150,000 results 2020 to 2023, 91,400 results Seems there is quite a lot of interests. (there will be some double counting and irrelevant papers, but there is a lot of scientific research happening in the field.