OT - There's lots of different places. Basically it's the same thing as an electric furnace, but a hot water coil in place of the heater elements. Here's one site, http://www.energykinetics.com/index.html. Here's another general website with info, http://www.hydronics.org/index.htm. This here, http://www.hydronics.com/news.htm appears to be it's companion website. The more I research it, the more possibilties I'm finding, and a gas furnace is way down at the bottom of the list. I think there is a house board around here, we could take the conversation over there and discuss it more fully. I'll post a message over there later, and put a link up.
And all of you with a gas furnace, now that heating season is over, turn OFF the pilot. You're just wasting NG and corroding your furnace faster. There's not enough draft from the pilot and most of the highly corrosive exhaust gases stay in your furnace. And any of you using those ventless fireplaces, gas logs or say kerosene heaters, you're crazy. I don't know if you would say they're banned in Canada, but they aren't allowed. You're basically polluting your house with them, they just don't kill you.
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