Plumbing & Mechanical’s PM Live Symposium, to be held Jan. 23, 2012, at the AHR Expo, will focus on green heating systems and how hydronics are a good fit for low-energy houses. The event features industry experts and Plumbing & Mechanical columnists Dan Holohan and John Siegenthaler. And until Dec. 31, you can get discounted registration for one session or both. Visit www.pmlivesymposium.com to register today.