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Kellxr7 10-12-2007 04:41 PM

Programmable Thermostat/Old furnace
I recently purchased a small home with a 30+ year old gas furnace, I was recently given a programmable thermostat as my friend upgraded & gave me his old one, I am wondering if this would be compatable with such an old furnace, or if it doesnt matter?

redline 10-14-2007 08:22 PM

Are they both 12 volt units?

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