Per the manufacturer, "The Thermo-Kitty Fashion Splash will emit heat all the time, otherwise your cat would not know it is heated and wouldn't be drawn to that heat. The sleeping surface of the Thermo-Kitty Fashion Splash will remain about 10-15 degrees above ambient air temperature when your cat is not lying on the bed. When your cat is on the bed the surface will warm to about 102° F.
You can leave it plugged in 24 hours a day, 7 days a week. MET Safety Laboratories suggests unplugging the bed if you leave your home on an extended vacation, as with any electrical appliance. Other than that, you can leave it plugged in all year without worry."
Nov 20, 2013