Our Solar Window Heater uses new technology to heat the air and warm the room for free. This technology will help lower your heating bill during the coming winter, and all without any installation. Easy setup include simple process of sliding up south faced window and hanging the unit so that the collector leans against the outside wall while the inlet and outlet will sit on the window sill. The inlet will suck the air from the room, circulate it inside the collector, and the outlet will send it back to the room at a higher temperature in order to warm the room. Our three position switch will allow you to choose between off, low speed, and high speed. The digital temperature display will let you know the temperature that the collector is generating. Free shipping, and ships within 7 Business days of order