Mercury Free Millivolt
Mercury Free, Millivolt Thermostat, Quiet Switching, 2 Wire, Use With 750 Millivolt Heating Systems, More Accurate To Plus Or Minus 1.5 Degrees, Does Not Work With Heat Pumps.
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Mercury Free, Millivolt Thermostat, Quiet Switching, 2 Wire, Use With 750 Millivolt Heating Systems, More Accurate To Plus Or Minus 1.5 Degrees, Does Not Work With Heat Pumps.