JohnW
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Everything posted by JohnW
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Loopcad trial expired and I haven't finished my UFH layout design
JohnW replied to JohnW's topic in Underfloor Heating
Thanks you all for the suggestions - looks like I need to find another PC -
I was too keen to download and play with Loopcad and unfortunately my 30 day trial has expired before I could finalise our ground floor plan. Has anyone any idea how I could extend the trial by a week or 2? Here's my latest effort at the layout design - all feedback welcome, but be gentle!
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Love the first picture of the grey kitchen, could you give me some more info on it please? Which model? Which colour? Which worktop & upstand? Did you design & order all the units & accessories yourself? Roughly what cost?
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This is what our architect specified...
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Our local library let you print A3 B&W for 30p/page...you could print a lot of pages for £200 - £300.
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Software to Model fall of Sunlight / Shadow
JohnW replied to Ferdinand's topic in General Self Build & DIY Discussion
Sketchup is great if you have a model - if not, I found www.suncalc.org very handy to show the path of the sun -
I've spoken to the company bringing mains gas to my area and they assure me that it will be available for connection at the end of 2019, approximately 1 year after our build is due to finish. They also spent quite a bit of time talking through the options and they are suggesting a System boiler with pressurised cylinder. I know I will be able to connect PV panels to this to run an immersion heater but I forgot to ask about a back-boiler. Have any of you any idea if it is feasible to connect a back-boiler onto a system like this or should I just remove the back-boiler from the equation?
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I tend to agree...on both counts.
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Thanks @SteamyTea, I have the as-designed SAP report but I'm not entirely sure which figures to lift as our energy demand, maybe you could tell me which ones from this selected extract; Section Water heating (kWh/year) Space heating (kWh/year) Calculation of Energy Ratings 2573.0868 5214.5496 Calculation of dwelling emissions for regulations compliance 2573.0868 6375.9114 Calculation of target emissions 2901.8514 18840.2881 Calculation of energy ratings for improved dwelling 1573.4793 5219.229 Thanks for this info - it's very helpful. Thanks also for explaining the differences based on ASHP & gas/oil boiler.
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Thanks @Nickfromwales, sounds like that's not a questions for another day after all. I dread to think how much time I've spent reading posts on this site, but still feel I know very little. Thanks again.
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Unfortunately not, but I have toyed with the idea of having an MVHR extract above and in front of the wbs, to help distribute some of the heat around the house. I've absolutely no idea if this is sensible or not, it's a question for another day.
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Does this not use loads of fuel? (are you using Oil?) I couldn't agree more. Thanks for the heads up on the Heatmiser controls. Would you mind telling what your whole setup is? I suspect I'll end up with something very similar to yours.
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That made me laugh - Keep it simple, a rule that can be applied to absolutely everything. Thanks the Salus IT500 has caught my eye - have you any experience of it? Thanks for the marriage guidance - we both want a real fire and have assumed that we might as well be heating the water at the same time, but it sounds like we would be introducing quite a bit of complexity and therefore cost. If I'm not back by tomorrow send help!! I'm coming round to this conclusion. Back to Keep it simple. What's an "airing cupboard" Thanks for the heads up on the Vailiant boilers.
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Thanks @Declan52
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No, we're only at foundation stage
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Thanks, similar to ours then. Who installed your PV, and are you able to give me some idea of installation cost?
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Sorry @dpmiller I'm not sure if I have supplied the correct figures, here. Which section of the SAP 2009 report should I take them from?
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Thanks again @Declan52 this is really useful. Can you give me a bit more info? What size is your house What size is your PV setup?
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Thanks @Declan52 How do you use your PV, is it connected to an immersion heater?
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PM sent - Thanks
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According to the as-designed SAP report... (which uses 0.15 U-value for external walls, which will actually be closer to 0.19 now we've changed the spec) DHW - 2500 kWh/year Space Heating - 5200 kWh/year
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Ok, the more I think about it, we really should revisit our original plan and get a second opinion on price to install an ASHP. Before I approach anyone for a price, I'd like to fully understand what the differences are between the plumbing requirements for ASHP and Oil. I had assumed the only differences were the heat source and that the rest of the plumbing system was pretty much the same in both cases. Can any of you set me straight please?
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If I scrap the "intelligent heating controls" what's the best way to operate the UFH whether it's on Oil or ASHP?
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Thanks @ProDave Dedicated air supply will be used, so hopefully won't impact MVHR
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Thanks @Tom We're planning to have a dedicated air supply for the stove.
