I already own 2-2 story green insulated outdoor houses. The feral cats I feed sleep inside and the heated pad with cover protects them from the weather & predators. They have two entrances/exits in case a predator enters. Many raccoons travel in packs & will kill cats. I do not put any food inside as predators will be attracted. I have the house on my deck under the rave and awning. It is on a Bluetooth/remote or if within my home WiFi range, can use a smart outdoor plug with app on mobile phone. Schedules can be set to turn on/off per schedule to save $. Low wattage so not much wattage and safe for animals.