The newly designed Hound Heater Dog House Furnace now features an incredibly long life, easily replaceable heating element. The Hound Heater Deluxe is the same great heater but we added a very, heavy duty, stainless steel spring that covers the whole 7 ft. of cord. It will protect even the most determined chewers. A 100,000 cycle life thermostat and an internal and external heat shield for incredible safety and efficiency. You simply set it and forget it!