Abstract: A device for being placed upon a house inclined roof for promoting the melting and draining of snow from a roof during a wintertime; the device consisting of a solar heat collecting box that includes a corrugated sheet metal bottom which heat up either by direct sunlight rays or by an electric heating coil, so that water under the device will continue to run instead of freezing, the device also including an adjustable reflector panel inside the box so to reflect indirect sunlight rays toward the corrugated, heat-collecting bottom, and the top of the box being closed by an upwardly rounded, transparent cover so to retain heat therewithin, the box in use extending over the roof eaves.