The Outdoor Dusk Detector is able to signal exceeding pre-set thresholds for the current outdoor temperature. Most importantly, it is you who set the temperature threshold. You can configure the system so that it will switch on or off the furnace in the house when the set limit is reached. In winter, the system can activate a driveway heater to relieve you of the onerous duty of shovelling snow in the morning or to melt a layer of ice so that household members don’t hurt themselves.