It is an excellent article. I was expecting something less informative.

This retire engineer in Nebraska has nice setup.

https://www.youtube.com/watch?v=4O3ifR-3zvs

I wonder if these kinds of designs can handle smaller scales. I'd love to have such a greenhouse on my 0.3 acre lot in Wisconsin.

Edit: I found this guy's store page[0]. This is what they say about size: "Greenhouse in the Snow kits are priced by the lineal foot and are available in 6' increments beginning at 30'. The greenhouses are 17' wide. Most kits we sell are 78' to 102' long. Greenhouses less than 60' long are less cost effective than bigger greenhouses."

I imagine smaller greenhouses like this are still possible though.

[0]https://greenhouseinthesnow.com/shop

Bear in mind that the ratio of the exterior surface to the volume of the controlled space gets worse and worse as you make it smaller. And that this ratio is what helps make it cost effective not just in material costs but in operating costs, since heat transfer is across that surface...

I get a Trojan alert going to the linked page.

Welcome to the Brothers of the Phin.

I'm fifty years old, but every decade I see the same announcement about the wonders of Brown Gas http://en.wikipedia.org/wiki/Oxyhydrogen

Strange, I can say most engineers never heard of this by the time they leave college.

Is there a great demand for hipster shoes?