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Forgot to mention that for those building new, they now have a more efficient R-15 insulation and a R-21 for walls. If building new, just go with the air sealing and the new thicker insulation in the walls for a super efficient home from the start.
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If you're building new, not retrofitting, nothing trumps geometry. a quasi-spherical shape will suck less heat (or coolth) out of the interior. The only house ever built to my design was in 1980.
When the wind was blowing 100MPH at the Oregon coast, inside it was as quiet as a Mercedes at the same speed. All you could hear was raindrops hitting the window panes.
My brother let himself in after it had sat vacant for two weeks and reported it was still at room temperature.
When the wind was out of the NW that upper deck was in a stagnation point. The greenhouse to the east is a boat tail to the prevailing winds..
If it is a retrofit, consider adding a greenhouse on the windward [or leeward] side.
https://i.pinimg.com/originals/3e/6f...72a95156c0.jpg
Octahedral geometry for a quarter-sphere.