If you are looking for immediate heating systems, radiant heaters are the good options for you. These devices generate the heat in the form of infrared waves which travel through the air and heat the objects which come on the way of radiations. In this process they do not heat the air, but only the objects.
Generally, radiant heaters come as gas radiant heaters and electric radiant heaters. Electric radiant heaters consume less electricity. Electric radiant heaters are more energy efficient heaters.
Electric radiant heaters come with more safety facilities, they provide manual heat adjusting facilities. Electric radiant heaters are very much suitable for smaller surface heating. Radiant heaters come in portable sizes and they provide sufficient heat into the area. Since they are highly energy efficient, you can expect good heating at low cost and maintenance. Since they do not use wood or kerosene to burn and produce heat, they are eco-friendly as well as neat heat producing devices.