Igloo Heated Pad Large. Round, or dome shaped doghouses have been a best seller for years and the Igloo Style Heated Pad is the answer to provide warmth for the animals using these homes. It's half round shape fits easily through the door of the home and allows for the pet to stay on or off the heated surface. Indoor or outdoor use. The Igloo Style Lectro-Kennel uses 80 watts of power. There are dual thermostats with the unit. The unit will maintain 10-15 degrees above ambient temperature until in use. Once the unit is being used, it will warm to the pet's normal temperature of 102 degrees. When the pet gets off, the unit goes back to the maintenance temperature.