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About le-cerveau

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  1. Hello from London

    The question is how are you going to insulate your basement, you ideally want to insulate outside the concrete to avoid/reduce thermal bridges. This is where ICF comes in as it forms the insulation and the former for pouring the concrete, subterranean you still have to waterproof outside the ICF with an appropriate tanking layer.
  2. As I get ready to go to the next stage I need to prepare for MVHR testing but I am looking for collected advice: The regulations state that systems need to be “commissioned in accordance with a procedure approved by the Secretary of State.” (Regulations below): This is the Part L1(b): This is Part F1(2): Throughout it refers to procedure approved by the Secretary of State. From the Domestic Ventilation Compliance Guide Table 8 this is the approved procedure: This talks about UKAS accredited calibration. In the BSRIA guide there is details about calibration: After all that I have come up with the following: I need to use the approved methodology. The equipment need to be calibrated and in date. The calibration needs to be UKAS, and not just traceable. The calibration need to be volumetric not speed. 1 &2 easy, 3 and 4 not so. And comments advice.
  3. Saturday night nonsense

    Due to blocked pipes only 5 will fill!
  4. Mine is an extreme build but the as designed SAP is 122 and environmental rating 120, this will reduce as the as designed had way more solar PV than we have installed but I expect it to still be well over 100.
  5. Velux Windows

    The question is where was the skip? On the public highway, then legally you can keep it. on someones property, then that is a different question.
  6. Bye Bye PayPal. You're no pal o' mine.

    I also use PayPal, but only for utilising my AMEX where it otherwise can't be used.
  7. I have also done mine, details in my blog.
  8. Help Needed With UFH/DHW System

    All sounds strange. DHW should come from the tank so if you have lukewarm showers then the tank was not hot and it sounds like it cools down overnight (what a surprise) and whilst the UFH is on doesn't heat up very quickly. (Solution heat it up in time for your shower). The circulation pump should have no impact on your ability to get hot water, just the time you wait for it! It should pull the return leg back to the center of the DHW tank, whilst the DHW feed should be from the top of the tank (is it all put together properly?). As you have a circulation system the pipes should all be very heavily insulated to reduce losses (shock/horror is the builder skimped on pipe insulation. We would need to see a system layout to provide proper advise then our resident plumbing expert could comment properly.
  9. DIY CH/HW Design - Thoughts? Help?

    You will find Architects don't usually consider technical issues just the ascetics. They leave that to the engineers to sort out!
  10. DIY CH/HW Design - Thoughts? Help?

    I won't comment on the borehole, however 25m run for a hot water pipe is not insignificant! 25m of 22mm pipework is 8l of water, 15mm is 3.65l, that is a lot of water to pull through to get to hot water. I would thing a circulation system (and well insulated pipes) would be your solution. If you go for accumulators to give you the pressure then you won'y have a cold water tank in the loft, just a sealed system. I am sure a resident plumber will be along in due course.
  11. Budget wired network

    To be honest if you can just run 10m extension cables from the switch to each PC, then that is by far the simplest solution. Otherwise you will have to run the cable from the switch to each PC and put a small patch panel on the switch end and a socket at each PC end. much easier to punch down into a socket/patch panel than wire pluhs and then use short patch cables at each end. As for the switch cabinet, what is the switch being used? (19" rack mount, there must be some sort of link equipment also) If it is 19" then it should be in a rack and you can just add a 19" patch panel (not that expensive)
  12. The issue is that the Building Regs are based around standard homes, as soon as you build a big (non standard) house they struggle. You have a large house so your whole house supply rate exceeds any extract requirements so you will always be extracting above the boost rate! (system balanced). One the system is certified you can always re-adjust, as many here do, but to pass inspection your system has to supply the house (and extract in a balanced system) at the largest number!
  13. Plant room location

    It is all down to what is going in! MVHR, DHW, Boiler, CU,....... I have a large plant room, but a large house, with 2 x MVHR units almost filling one wall. There is no wight/wrong answer just less than optimal decisions/compromises.
  14. MVHR Spec??

    You can definitely DIY it. I just have, see my latest blog entry: I did all the calculations my self, I have a floor area of 438m2 which was my defining limit giving a unit requirement of 472.92 m3/h, so beyond one standard unit, I ended up with 2 x Brink Renovent Excellent 400 plus units. From the blog you can see it can be installed however I did have the help of my builder (with all the tools) but you definitely need 2 people when running pipes. I spent a long time working out duct runs which paid dividends during the fitting even though we varied, as I knew the plan back to front alterations on the fly were easy. All my equipment came from CVC, they also supply Ubbink ducting, though it is not on the website, just e-mail them and they will send you a price list for all the components. For power I went with aiming between the 50-70% mark, with my theory being the slower the fan runs the less noise and if you look at the performance tables they are more efficient (heat exchange) at lower settings, so personally I would go towards the 400m3/h. As for pressure difference that depends on your duct design, the longer more complex the duct/manifold/terminal arrangement the higher the pressure! Reading into @JSHarris blog and subsequent conversation he states that he probably wouldn't fit a Genvex in hindsight (wait to be corrected) as it is not really needed in his situation. and @PeterStarck units also does DHW so not just an MVHR unit. For your calcs personnel calcs is based on 2 personnel for the first room and one thereafter, not what you can cram in, it is all building regs based, you need to work out if your extract requirements exceed your floor area supply requirement and base your system on the greater of these.
  15. Maps for planning

    Go for the full topo, mine cost £475, including the existing house (demo-rebuild) and the relevant details of the neighbours houses (extremely sefull when we had to prove we wernt overbearing and overshadowing). This formed the base for all the designs there on.