If you are thinking of various alternatives for indoor heating, then you can go for insulated panel systems. It is basically that structural system which includes the presence of an insulating material between two structural panels or boards. You can find many insulating panel systems in roofing materials. Many people use such panels to keep their homes naturally warm and comfortable all year long. It is definitely cheaper than using electronic equipments and they are easy to maintain too.
Another advantage of using insulated panels systems apart from the heating property is that they also provide a sturdy and durable structure to the house. These panels have good thermal properties and also lightweight. Their installations are done within a day or so depending upon the kind of installation you want and the size of your house. So if you want a cheap and effective option for indoor home heating you can go for these insulated panel systems.