Abstract: A heat radiating pipe (2) that is disposed in a hot water mat (1) is extended from the hot water mat (1) to provide an extended portion that is used as connecting pipes (2a and 2b) to a heat source machine (11). The construction makes it possible to prevent a water leak as there is no connection therebetween, and reduces costs for parts and installation as no connection tool, such as a coupler, is used. Further, guide pieces (13 and 14) attached with cover members (17) are arranged at positions where the connecting pipes (2a and 2b) are extended, and the connecting pipes (2a and 2b) are disposed by using the guide pieces (13 and 14), so as to efficiently utilize heat radiated from the connecting pipes (2a and 2b), and to prevent thermal loss.

Abstract: A compact signal light is provided with LEDs arrayed across its front face, and a magnet and/or suction cup on its rear face so that a user may readily mount it on a refrigerator door or the like. The front face of the signal light may bear the name and telephone number of a delivery or emergency service so that a user may resort to the signal light when making an emergency or delivery call. The user may then turn on the signal light so that its LEDs are illuminated (with one or more of the LEDs preferably flashing), and place the signal light on a door or window where the delivery or emergency service is to be rendered, so that the location is more easily found by the delivery or emergency personnel without “hunting.” The signal light provides a particularly valuable tool for pizza delivery companies and the like because it serves as an advertising tool reminding the consumer of the company, as well as providing the company with a way to more quickly and efficiently render its delivery services.