This house comes with and accommodates a Kitty LectroSoft. 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 Thermotatically controlled to heat to 102 F, regardless of the size. Dual Thermotat simply means there are two internal Thermotats that will keep the surface of the bed at 10-15F above ambient air temperature when your pet is not on the bed. When your pet lies on the bed,itill warm to about 102 F.