In some parts of the we still get a good amount of sunlight during the Winter months, however it is still pretty chilly outside. Instead of cranking up the heater in your home why not install a solar air heater that sticks on easily to one of your windows? It is very easy to install, all you have to do is place it against a window with southern exposure. Unlike your window AC unit you do not need to open or remove the window. The panel has a built in digital thermometer which allows you to see the temperature of the air that the heater is blowing out.