SteamyTea

Depends how you class it I think. If it is just pure liquid water, then no. But water with other elements, like carbon then probably higher. But then, do we count the bacteria that is inside the body, but is not human. My sister is 80% scotch, but was born in Wales.

Yes, but tuned to jiggle water molecules. All heating is just moving atoms.

Not quite. Expansion has often come up as a negative for GRP roofs. Not known it to be a problem, but then, there are big roofs and very big roofs. I think the main problem with GRP is that people think it is easy to do, and can be done by anyone. Because of that, we ended up with the Reliant Robbin (I used to employ some ex Reliant workers, they were useless). It is like plastering, anyone can learn to do it in a day, then you just get better over the years.

Another way to look at it is, if it was so great, we would all be using it.

Here is part of an email I received a while back. Good morning FAR INFRA-RED HERRING I have decided that the phrase "far infrared" (FIR) will henceforth count as a trigger word for bogus energy-saving claims. First used in 1923, FIR is radiation with wavelengths between 10 and 1,000 microns, which (digging in physics books) corresponds to temperatures in the range 3 TO 290 degrees absolute. That's minus 270 to plus 17 Celsius. So when regular reader Will S. drew my attention to an electric radiant heater that claimed to use FIR I was intrigued, and looking more widely on the web I found the term used in relation to saunas and therapeutic clothing, suggesting that it is one of these legitimate scientific terms that has been co-opted for the promotion of snake-oil products. I have nothing against radiant heating in principle. Quite the contrary: for selective heating of spaces that are sparsely or intermittently occupied, or subject to high air throughput, it is likely to be more economical than warm air heating. But the case study that Will sent me was amusing. It concerned a hair salon whose gas-fired central heating system had been replaced with radiant panels. Fair enough, except that some of the panels took the form of heated mirrors. I don't know what the emissivity of a mirror is, but I'll wager it's closer to zero than one. The vendor may care to reflect on that."

I work in kitchens a lot, people spend way too much time and money on them. Stainless steel is the professionals' material of choice.

Musk is a South African, so he should know a bit about economic isolation, eventhough he is a bit young to have experienced the worse of it firsthand.

Portland cement is named after Portland stone, because it looks similar. I had a Portland stone house in Weymouth. Was well stained and grubby. Still is by the looks of it.

Mix some soul in, along with your favourite breakfast cereal seeds, maybe some herbs, a chilli plant. Then place in the garden and forget all about it.

Get @Onoffto have a go, then after a decade we can revisit the topic.

Make a small sample, or 3, and do some tests.

The Japanese inverter ASHP are good, as are the Carrier ones. Carrier are often rebranded in the UK.

Someone posted up about a new inverter that got rid of the 'magnetics'. Getting rid of the capacitors is what is needed. Or at least a simple replacement service pack.

They work ok in deserts, so I think the UK climate poses little challenge. Now the inverter on the other hand is better off kept as cool as possible, especially if it is limiting output. I have get to see some decent, public data on inverter life.

Too right. It is a combination of angles, hours of daylight, ambient temperature and cloudiness. Though I think my peak generation month is June. Not checked for years.

You were lucky, when my sister met him, he pulled out his bible (about 1970). At least it was not his colostomy bag.

probably because it does not have a real CO2 sensor, but one that measures H and then makes assumptions.

Does it log the data, in English?

You going to put up circuit diagram, code and parts list.

Depends on the filter medium. Some is just the same stuff all the way through. Others use a courser filter first, then progressively finer. The only time a single medium filter may cause a problem is if it has a supporting cage and different seals in one side.

It is because measuring carbon dioxide is expensive. Relative humidity is a good proxy though and will tell you all you need to know in practice.

Does out need to be glass, could you make it from cast acrylic. Walk in glazing would do it.

That is a totally different problem. Not one they have with the front window of the Intercity 125 trains.

Basically what I heat my home with, just mine are storage heaters. My house is not new or passive.