Simon Forman> The first ‘active’ greenhouse to be built, as was discovered by chance in 2001 in a historical document, was in 15th century AD Korea. On the basis of the surviving document, entitled ‘Growing Vegetables During Winter’, a reconstruction of the greenhouse was made, and it was found to combine traditional heating technology with sophisticated heat retention features and control of condensation.
https://londonkoreanlinks.net/2019/11/22/the-worlds-first-active-greenhouse/
Via: https://permies.com/t/262705/Medieval-Korean-oiled-paper-greenhouses
The World’s First ‘Active’ Greenhouse | London Korean Links
The greenhouse is an ancient invention, dating back 2,200 years. Modern ‘active’ greenhouses are distinguished from older ‘passive’ ones by the fact that they allow for the adjustment of air and soil temperature. Previously, the first such greenhouses were believed to have been built in Germany in 1619, using a stove to regulate air temperature,
Torger Åge Sinnes