Thats exactly something I need. Are they reliable?
You can plug it into any heater or AC?
seems reliable enough... it has a little battery in case of power outtage so the settings and time is saved.
it has a cool/heat toggle, i have it set to cool, so when the temp goes over 74 it'll turn on. i currently have it powering on and off a motorized damper. so when the temps get too warm in my room, the damper, which is situated on the negative side of my blower, opens. the damper lets in cold fresh air until the thermostat, located upwind from the damper, turns of the damper and the damper closes. it works like a charm right now.
the heat toggle does the opposite, it would turn on a heater when the temp goes below the indicated setting.
i originally bought it to control my AC, because i needed a remote thermostat for the unit.
i'm really happy with this little unit, and i would get another in a heartbeat.
hope that helps you out kind sir!