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JohnMo

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Everything posted by JohnMo

  1. JohnMo
    MVHR is ventilation. Aircon is heating and cooling, it's not ventilation. You need both ventilation and heating. MVHR doesn't solve the heating and Aircon doesn't solve your ventilation requirements. Your builder is talking out of his .... MVHR or another ventilation system is a must have. It's not something a heating appliance will replace
  2. JohnMo
    Think you have chosen it, easy enough to do yourself.
  3. JohnMo
    Home assistant uses the IP address and you can change anything you want from there, same as the Monitor app does. So fingers crossed. The phone app is useful to find the IP address, mine seems to have changed a few times, no idea why.
  4. JohnMo
    All sounds dinky. My balcony structural engineer designed, was a combination of 10x2 and 6x2
  5. JohnMo
    Yes all UFH plus one fan coil. I have found raising flow temp 1-2 degs higher than I thought was needed, at higher oat has allowed more controlled modulation, have had to use a high limit thermostat set at target house to kill the heat pump off though. The lower the flow temperature the higher the minimum output. It could be you are at or below min modulation and boiler is protecting itself, instead of switching off.
  6. JohnMo
    Had an email the other day saying cloud services were now going to charge via a monthly subscription. Sort of raised a warning bell. Will do things other ways, locally via home assistant and or Monitor for GivEnergy Inverter.
  7. JohnMo
    Those flow rates are higher than my heat pump, it's generally settling down to about 0.36m³/HR, most the time
  8. JohnMo
    Isn't this why structural engineers exist? Plus with drops you should have a structural design certificate anyway. Other than that no comment
  9. JohnMo
    It may bring you presents if your unlucky.
  10. JohnMo
    I'm more worried about more wild stuff coming in for the night.
  11. JohnMo
    She has a lot to answer for, energy market (oil and gas given away) etc as well. Plug in solar, if you get a fee for registration, who will bother registering? Suggest no-one.
  12. JohnMo
    We have opening doors on to our decking in all bedrooms, but you can't really leave those open, an open window while sleeping, is very different from an open window for a sense of security.
  13. JohnMo
    MEV is a single fan unit with all wet rooms feeding into a single unit and then to a single outlet through the roof. Get an intelligent one that alters fan speed based on demand, and install humidity activated extract terminals. Then add humidity activated trickle vents, for a fully demand operated ventilation system.
  14. JohnMo
    People say the same for timber construction, which is standard building method in Scotland. No one has issue with finances or sales. External insulation has been given out free for ages by the government, so not seeing the issue there either. Personally I wouldn't do block or cavity build, it would be ICF or twin stud timber frame, as I could do both myself.
  15. JohnMo
    If your a new build that is pretty airtight with MVHR and decent insulation, unless the house is 400m² I doubt 7kW is correct, especially near Cambridge.
  16. JohnMo
    Why MEV instead of dMEV if venting via roof. But that's another topic. Hybrid is fine as long as all the details are worked out and followed. Warm roof also fine as long as all details are worked out etc. Doesn't make either easy to do well You can do that, but you still need to fill between rafters at the wall to roof insulation gap and stop air movement and give continuous insulation layer.
  17. JohnMo
    Insulation above roof is in theory easy to do. But you need to detail well, think about how you seal the gaps between the roof insulation and join to the wall insulation. If you rafter is 150mm high you have a gap 150mm to fill at every rafter. Why not through wall? Hybrid roof insulation Can be a recipe for disaster if you don't follow the rules and have a sound basis for construction.
  18. JohnMo
    Or don't bother with cavity - block wall and external insulation? You can see exactly what is going on.
  19. JohnMo
    XPS poly beads, every gap is filled around the whole building, any damp gets in the poly beads allows it to drain away. Easy
  20. JohnMo
    Poly beads.
  21. JohnMo
    Factor of safety
  22. JohnMo
    If doing a timber frame, look for cold bridging at the wooden sole plate and foundation also. Then design out.
  23. JohnMo
    Ballast buckets, do a good job of spreading loads
  24. JohnMo
    FH Brindle, Made2Measure. Make sure if you have a drop the other side you get the correct structural specification. Also if in a high wind area, you also account for wind loads.
  25. JohnMo
    I would worry the centre of the plasterboard sagging with a 1m span.
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