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YorkieSelfBuild

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  1. YorkieSelfBuild
    Update: after talks between architect and installer, the design is for high flow temp to rads so will need only small rads but in practice will run at same lower temp as UFH or unused. Still waiting to confirm if need only in bedrooms and if small enough to go under window seats so don't take up wall space. Estimated £900 extra, not terrible but still another 1k to budget
  2. YorkieSelfBuild
    Just noticed, the IMS pump is 4kW, not 9.5kW. • Heat Pump: Riello NXHM004 4kW 230V • Controller: Homely That 9.5kW might be the output at outdoor temp of -3.4C?
  3. YorkieSelfBuild
    It's for UFH on GF as well. It's still massive? Compared to 9.5kW, seems small Cool Energy said they can supply for grant for extra £1k (commission after installation, documentation, etc). The UFH is separate, so just installing pump and DHW.
  4. YorkieSelfBuild
    I got a quote from Cool Energy, £5800 inc VAT but not installation. • Heat Pump Output: We recommend a heat pump with an output of 5.90kW. • Design Temperature: -3°C ambient temperature with a 35°C water flow temperature, suitable for underfloor heating (UFH). • Heat Pump Model: We recommend the Cool Energy CE-IVT10-EVI, offering 4.89 kW to 10.47 kW at the above design temperature. • Hot Water Cylinder Size: 200L, calculated at 50L per person plus an additional 50L. • 200L Pre-Wired Hot Water Cylinder • CE-B60 60L Stainless Buffer Tank • 25L Inhibited Glycol • System Filter, CAT6 Cable, Flexi Feet, Pre-Insulated Hoses • WiFi Adapter How much would installation cost? No detailed plan, just ASHP and DWH supplied, is that normal?
  5. YorkieSelfBuild
    All 3, cleaner without, added cost, stops wall being used. But also are they needed or is proposed design flawed? Plus the flow temp is 40C+, higher than for UFH.
  6. YorkieSelfBuild
    The architect is suggesting to IMS to use rads designed for high flow temp but actually run it at same lower temp used by UFH, so there's no mixing. If rads were designed for low flow temp, would they be even bigger?
  7. YorkieSelfBuild
    The architect explained it (or just said what IMS told him) as Riello being a budget sub brand of Viessmann but it seems both are owned by Carrier after it bought them, which is very different. Also I've seen Riello NXHM 12kW at £3800 inc VAT, so £5.5k for installation?
  8. YorkieSelfBuild
    The price is £9.5k for ASHP and installation, minus BUS grant but adding more for the rads. The architect said it was a good price, maybe they getting rid of stock, too big and R32?
  9. YorkieSelfBuild
    How big is your house? Mines 118m². I've read in newspaper articles about people not getting the right size ASHP, usually too small but possibly mine is too big.
  10. YorkieSelfBuild
    Ah, gotcha. Like emailing CEOs. Thanks
  11. YorkieSelfBuild
    Thanks for all the replies so far. I've contacted several installers around Sheffield, let's see if what they come up with is drastically different.
  12. YorkieSelfBuild
    Here's the UFH power figures
  13. YorkieSelfBuild
    They already spec K2 rads in bedrooms
  14. YorkieSelfBuild
    The 9.5 is the outdoor design temperature DOT -3.4C (from their website https://www.imsheatpumps.co.uk/blog/understanding-your-heat-curve/) Will ask about R290 refrigerant, thanks
  15. YorkieSelfBuild
    Who's Adam? I'm still pretty new to the forum
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