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ProDave

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Everything posted by ProDave

  1. ProDave
    My worst case heating week has been 95KWh of electricity, the week it was down to -14 one night and not above 0 in the day. So that averages 13.7KWh of electricity per day. Assume a COP of 3 for the heat pump and that's 40KWh of heat per day, or equivalent of 1.7KW of heat into the house continuously. That is a little under the estimated 2KW heating requirement so shows how incidental heat input is helping reduce the real figures.
  2. ProDave
    Ask him for a breakdown of how he arrived at his price, then start "discussing" it.
  3. ProDave
    You need a box spanner in there. How about just fit a new tap, one of the nice modern quarter turn ones with a ceramic cartridge instead of old fashioned tap washers? It could also be a furred up pipe.
  4. ProDave
    +1 for buying from Build Plumb Plastics, that is where our drainage stuff came from. Make sure you get the treatment plant fitted correctly, i.e. concreted in if you have a high water table. Don't forget a SWA cable to power the treatment plant while you have the man and digger on site.
  5. ProDave
    Stuck plunger inside the tap mechanism. Especially if it is an old design of tap. Turn the water off, remove the tap head and check.
  6. ProDave
    With thermal stores there are many variations some with heat exchangers and some without. My own UFH runs direct from the ASHP. So the primary circuit with inhibitor is from the ASHP to the UFH and to the UVC heat input coil. Some use a buffer tank with UFH in such a situation. I am not sure if that can be combined with an UVC or not.
  7. ProDave
    An UVC has potable water inside it, so that is the water that comes out of the tap. It is heated by a heat input coil that runs from the sealed primary circuit with inhibitor, To use with a heat pump you should get one with a high capacity large area input coil. You can have more than one input coil for different heat sources. A thermal store has never changing contents, that just gets heated and cooled time and time again. Hot water is delivered by passing cold mains water through he aheat ercchange coil at the top of the tank, or through a plate heat exchanger.
  8. ProDave
    I am pretty sure (though they don't make it clear) that the Ecodan cylinder in an UVC not a thermal store, so it only has to heat to target temperature not higher. With a 270L tank I am surprised you have not run out of hot water. Obviously the ladies in this house use more water than your household as after 2 "ran out of hot water" incidents, I added an electric modulating water heater as a "reserve"
  9. ProDave
    The obvious thing is try a new thermostat. I expect you are wanting THEM to change it?
  10. ProDave
    What has he quoted you? Is the drainage field OUT of the treatment plant done yet? That could be more expensive than the pipes to connect IN.
  11. ProDave
    All you need is your percolation test results, from which you calculate the area of land needed, then a plan showing where on the plot (or off the plot) that soakaway area will be. Allow for minimum distances from the soakaway to buildings, site boundary, highway and any watercourses. You are demonstrating that you have a design that works for the plot. Exact layout of pipework within that area does not matter.
  12. ProDave
    Where is this "trip"? Are we talking the pop out button on something like an immersion heater thermostat?
  13. ProDave
    That's nearly £1000 per square metre to finish a shell. What are you expecting to pay? What skills do you have to do any of the work yourself? What is your timescale? Obvious savings, they don't need "site facilities" if you offer use of the WC in the main house etc Cleaning, rubbish disposal, landscaping etc can you do any of that yourself?
  14. ProDave
    Thermal store, as soon as you start drawing heat from it, the temperature starts to fall, so to get a sensible capacity of actual usable heat, the temperature in the stoer needs to be a lot hotter than the water temperature you actually want. otherwise you will only get hot enough water for a very short time. On the other hand, an unvented cylinder delivers water at it's stored temperature and continues to deliver that temperature until it is almost empty. So a heat pump works well with an UVC but not very well at all with a thermal store.
  15. ProDave
    Blown beads is a less good insulator so needs to be thicker, BUT it stands a LOT more chance of being done right and actually working, The big problem with solid boards is detail. It is very easy to cut them a bit under size and have air leakage past the insulation making it very much less effective. Do you really trust the builder to spend the time and care to get it right when your "target" is as cheap as possible?
  16. ProDave
    Or my case hypercheap DIY install 4KW for £1500, I hope it to have paid for itself in 5 years.
  17. ProDave
    Not a construction method I have seen. It would not be allowed here but as the post above shows it may be okay where you are.
  18. ProDave
    Is that describing a timber frame? If so you normally have an air cavity between the brick and the timber frame but that says 50mm cel;otex. That is not a wall make up I recognise.
  19. ProDave
    And the report again perpetuated the myth that space heating is the largest household expense. It is NOT. I repeat my claim that Council tax is the largest cost of owning a home, with little chance of ever reducing it. Initial estimates suggest my Council tax will be not far from 10 times my heating bill. I repeat my claim to be in "council tax poverty" and I suspect in reality a lot more people are, than those in "fuel poverty"
  20. ProDave
    That was a poor install then, I have seen several and done the wiring for 2, and in all cases the pump and controller was in the plant room next to the thermal store. The only wiring in the roof was the temperature probe back down to the controller. I believe on the plumbing side there is a bleed valve at the highest point in the sustem but that should be inside the roof and accessible.
  21. ProDave
    Another vote for the one on the left, it is designed to bite into the insulation.
  22. ProDave
    Only when you have tried and failed to work it out without reading them.
  23. ProDave
    Each flat will needs it's own independant supply anyway now. So one shower and some heaters is quite possible. Agreed for rental simple is best, so put your efforts into a well insulated building with decent Windows and see how you get on. Air tightness (which means attention to detail on the build) will be an important part of that. Give consideration to installing mvhr which will help hugely, and is only a 6 month filter cleaning excercise so not onerous for rental. Probably modern storage heaters which these days have electronic controls would be the best option?
  24. ProDave
    I thought Seaman Stains was introduced when the author go the hump, and it escaped sensorship. I might only have been broadcast once though.
  25. ProDave
    At £45 per metre it will be a lot bigger than a 35mm concentric. Probably Wavecon 95 or bigger which is what they tend to use up here.
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