This house comes with and accommodates a Kitty Lectro-Soft. The roof hangs over the 2 doors to keep cats warm, safe and dry. Easy to assemble with hook and loop fastener walls and a zippered roof. MET listed. All K&H heated products are thermostatically controlled to heat to 102 F, regardless of the size. Dual thermostat simply means there are two internal thermostats that will keep the surface of the bed at 10-15 F above ambient air temperature when your pet is not on the bed. When your pet lies on the bed, it will warm to about 102 F.