Nest Thermostat Converting from Line Voltage to Low voltage

I have two thermostats in the first floor of my house, one for heat and one for a/c. The one for the a/c is programmable, and low voltage ( or so I have been told) the one for the heat is line voltage. I would like to hook the heat up to the programmable thermostat. To make one thermostat. What do I have to do to convert the line voltage to low voltage? Someone told me about a relay, of which I have no clue, I also saw an adapter in Home Depot, for what seems like just this type of thing. Is it that easy or should the relay be installed, or both?

1 comment:

  1. Anonymous2/24/2015

    I understand you want to replace a line voltage thermostat with a low voltage programmable thermostat. I see this as a simple relay hook. The new low voltage thermostat would be used to switch a relay that would switch the line voltage for the baseboard heaters. I can not think of the name of it just now but there is a company that makes a kit just for this. I have install 3 or 4 over the years. In your case the thermostat on wall now (the one in the picture) would be replaced by a relay box. The new low voltage thermostat would be placed beside it. A short wire would connect the two. The new low voltage thermostat would have it's own separate power supply. Google "baseboard heater relay kit"

    EDIT=Here is once such set up http://www.fixmyownairconditioning.com/images/ACC0436-wiring.gif

    Here is one with the unit mounted knob control being replaced by a relay. http://www.gntrains.com/CanalCar/Images/P02_0203_1758_0045a.jpg

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