This. There was a great video posted on HN a couple years ago, by one of the few guys around who tunes up these old radiator systems. Apparently a lot of them were quite genius in design, but years of neglect make them not work very well. Was a fascinating video to hear him talk about common problems, and the amount of troubleshooting and problem solving involved with making these radiator systems work as designed again.
What a cool video and thread! Thanks for sharing! Sometimes I wish HN had a “random old thread” button like Wikipedia so people could stumble upon the hidden discussion gems like this one.
Dan Holohan, for those interested. https://news.ycombinator.com/item?id=18430512