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 w

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. Dan Holohan, for those interested. https://news.ycombinator.com/item?id=18430512 https://news.ycombinator.com/item?id=18430512