"By the way you're a good looking group. Thank you for taking care of yourselves. Last week I spoke to a group that was butt ugly and it was really difficult. Speaker's burden, so... thanks for taking care of yourselves" Now THAT is a technique haha.

This guy's so amped up and excited about this stuff it's amazing - even if you are not interested in steam heat, you are now!

EDIT: This presentation is also great - similar, but more history: https://www.youtube.com/watch?v=nkgM0qCy5o4