in my room the ranco is on the outer wall. i want it to sense the coldest wall. the probe is shoulder height and about 2 inches off the wall. i set my oil-filled heater to the low setting (600 watts). the dial thermostat on the heater is set to max. i them plug it into the ranco and adjust my temps where i want them. i have accurites around the room at shoulder,waist and ground level. i mainly look at ground temps and cool side tub temps.
vaughn