Home improvement

From: Wade T.Smith (wade_smith@harvard.edu)
Date: Sat Apr 14 2001 - 02:02:14 BST

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Subject: Home improvement
Date: Fri, 13 Apr 2001 21:02:14 -0400
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From: "Wade T.Smith" <wade_smith@harvard.edu>
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    Hi Joe E. Dees -

    >What's a thermostat? A rheostat?

    A thermostat is a switch/thermometer combo, that thing on the wall in
    most centrally heated buildings, that you adjust, and that regulates the
    heating/cooling system.

    It used to be a simple mercury switch on a thermal coil, but I suspect,
    especially in these days of mercury hysteria, more and more of them are
    digital switches coupled to voltage controls.

    Anyway, there might be a rheostat in those.... The mercury switch ones
    were mostly mechanical.

    - Wade

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