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SteamyTea

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Everything posted by SteamyTea

  1. Nor are combi boilers, most people take very little interest in the sizing of them, or the flow rate they can produce.
  2. There seems to be some misunderstanding about 0°C. Much better to calculate on the kelvin scale, then you will see how little the CoP actually drops. The biggest enemy is really humidity at ~4°C, this is when air will have its highest humidity levels (note humidity not relative humidity), this is why ASHPs are oversized, once above or below that temperature, the CoP often rises. They work by extracting energy by cooling the air that passes though them, if they cool some water, then they get extra energy. If you had to choose a temperature scale the zero point should be the lowest temperature that the refrigerant gas can go to, but that is all a bit academic. But as @IanR points out, the DHW is the real challenge, not the space heating.
  3. You have a new design house, the UFH was designed in from the start. An old place, with a 'normal' plumber specifying UFH, it would run the system at a higher temperature.
  4. Or a holiday. https://www.independent.co.uk/news/yulin-dog-festival-china-carrie-johnson-b1870551.html
  5. Shotgun and spade would have been a more permanent fix.
  6. Welcome I am interested to know why you looked into a GSHP? Three things, with a 'system' type boiler, which a HP is, DHW is stored in a cylinder, ready for use, so no waiting, and you can get very good flow rates. An UFH installation requires extra insulation under it, more than building regulations suggest. This is because the floor will be at 35 to 40°Cm rather than about 18°C, but the ground will be at the same temperature ~10°C. It is the temperature difference that is important. Finally, it does not matter what temperature the heating system works at, the energy needed to heat a building to the desired temperature will be the same. Power, Energy and Temperature are different things. Reducing thermal losses means you can use a smaller system, most heating systems are sized for DHW demand and not space heating, but an ASHP is designed to be a little larger than your peak power demand. This keeps the Coefficient of Performance (CoP) in a more efficient place. Then there is the manner in which they are used, they are kept on, chugging away, rather than blast out heat, turn off for a while, then blast again. Modern ASHP, if designed and installed correctly, are not expensive to buy or run, nor are they noisy.
  7. Probably, and for DHW usage. The loft is a strange place to install an ASHP, or do you just mean the buffer and cylinder, maybe a pump as well, are up there.
  8. Then every little thing that goes wrong with the users life, be it a late delivery, divorce, cold coffee etc, can be squarely blamed on Microsoft, for ever.
  9. UV curing acrylic is used to repair windscreens. This is mainly because it adheres to the acrylic film that makes up the laminate. It has a slightly different refractive index to glass, so can be quite visible when looked at from an angle. Polishing anything properly is long and painful, you have to polish much more than you ever imagine. If your glass is covered by insurance, a small child throwing marbles at it can cause real damage. But depending on the size, maybe @pocster can help.
  10. I was always under the impression that the big selling point of an Apple products is that they are immune from viruses and malware. What all the disciples always said. Learn something everyday. Still, I am sure there is some free software that will sort it, there is for the other major OSs.
  11. How traditional.
  12. Only because I told her to say that to you.
  13. Yes, but we don't polish ours. I guess Cornwall is too far for the Zoe to get to. Still the mountain men on Exmoor will keep you warm.
  14. That is because you were in Devon you (expletive deleted)ing halfwit. This is Cornwall, we have palm trees and pampas grass.
  15. So probably comparing a basic combination boiler with a proper HP installation. Why don't they compare a system boiler to a non MCS setup.
  16. Too late, already been told off and had a post deleted. So much for bringing light relief to these troubled time.
  17. Did that include digging up an existing floor, insulating and recasting? And did he cost in connecting to the gas main if it is further away than the free connection. Was going to visit £20,000 to connect my house. One of those things that cannot really be compared purely in hardware prices.
  18. Single room MVHR. And internet disconnect.
  19. I just had a quick look up of the recommended download speed for 4K TV. 25 mbs. How many 4K TVs are people watching at once.
  20. On a Linux machine I just control c it to stop. Windows is a bit more polished and stops after 4 pings. Try ping -c 4 google.com (or whoever)
  21. Look at this. https://www.britishceramictile.com/how-to-tile/ceramic-vs-porcelain-tiles Seems that the glaze is a separate thing.
  22. Read up about it here. https://en.wikipedia.org/wiki/Thermal_radiation The calculate that it isn't worth the bother as the temperature differences are too small. Thinking about it as visible light is not how it works, we can't see sound and radio waves, but we can reflect, bend and focus them. The smaller the gap between the radiative and adsorption surfaced the more energy transferred. Conduction is only radiative transfer, but at the scale of electrons turning into photons.
  23. We all thought Kenny Everett had died, he just entered you. https://images.app.goo.gl/Xv1yx13KLyERF8s4A
  24. At 11p/kWh, that is about the same as my E7 night rate and about 11p saving over my day rate. Trouble is I only use between 1 and 2 kWh during the day. So £9000 / £0.11 = 81,818 kWh 81,818 kWh / 2 = 40,909 days 40,909 days / 365 days = 112 years The price needs to come down tenfold.
  25. Steam is condensate and will not disappear, it will coalesce on surfaces, just like vapour (which is a mixture of gas and condensate) will if the surface is colder than the transition temperature.
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