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Posted By: Saintnot forgetting 170mm aerogel would of course give a U value of 0.07W/m2K
Posted By: Shevek0.15 is my target for passivhaus retrofit.
Posted By: TimSmallGetting 80% of the way to the passive house retrofit spec
Posted By: fostertomI see cork is being seriously introduced by Mike Wye Associates - v gd move, might save Portugal from total Eucalyptication.
Posted By: TimSmallSo with all that in mind, given your situation, I think I'd go for Platinum EPS.
Posted By: ShevekI like the Passivhaus standard because it's not an arbitrary target.
Posted By: TimSmallGiven a budget of £80000, you could either:
Posted By: SteamyTeaScenario 1 would price CO2 at
Posted By: Shevekpassive solar design
Posted By: fostertomPosted By: Shevekpassive solar designPH is not serious about that. Much more solar gain cd be gathered and usefully deployed in winter, without risk of summer overheating (which is the limiting consideration in PH), if only alternative ways of doing so were considered within PH. Dr Feist apparently researched that 25yrs ago and concluded that it was impractical or ineffective, so put PH's major focus on insulation and airtightness. But new thinking has happened since - which PH hasn't incorporated. If more winter solar gain were allowed, then the rest of the PH standard could be relaxed.
Posted By: fostertomBut new thinking has happened since
Posted By: djhdo you have a link to a description of what passive measures to capture more winter solar gain you are thinking of?
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