I have a portable thermostat for the heater set this year at 55º. Last year it was 65º. We'll see how the new insulation works whether I should raise it or not. It is too soon to tell. The box fan is above and to the rear of the heat dish. When the hot air rises as it naturally does, the idea is to get the fan to whirl warm around. I am sure it cools down by the time it rises 8 feet and swirls around. But my thermometer stays constant. The heat dish is closest to a large pot of spiral ginger and Giant BOP, verrrrry tropical plants. I hope it keeps it's soil warm. I have two thermometers, one on the door that I can read from the house. And the one in the center of the GH. For the most part, unless the sun is out, they are the same temperature. And I don't worry about temps when the sun is out.
