Sanitariums

https://en.wikipedia.org/wiki/Sanatorium

I guess the modern descendants are the health retreat, the rural airbnb, and the day spa that offers oxygen therapy.

I wanted to long for the time when people hated "Malaria" and wanted to move to "Beunos Aires". But they believed the arrows chase us at daytime and the plague engulf us at night, like in the Psalm.

Since Eastern Europe is relatively poor and sensitive to energy prices a lot of households invested into insulation, new windows, etc. Last 20 years there was also a huge boom for heat recovery ventilation. Such a simple and inexpensive device that provides so much. Should be first item in every household to invest into.

Funny part is that locals here are absolutely scared of any sign of draft or direct aircon. All while it's what actually saves their health lol.