www.pmmag.com/articles/102652-john-siegenthaler-to-do-fb-live-qa

Update (Jan. 2020): Click here to watch the Facebook Live video with John Siegenthaler (the author) on this same topic.
John Siegenthaler to do FB live Q&A
January 22, 2020
John Siegenthaler will be doing a live Facebook video answering questions from our readers.
Topic: Do's and Don'ts of Hydronics
Day: Tuesday, February 4, 2020
Time: 2:30 – 3:00 p.m. ET
Where: On our Facebook page — https://www.facebook.com/PMmagazine
Join the video live from anywhere in the world. Ask your questions in the comments of the video. He can see them in real time and answer you back.