A carpet blower is a very handy piece of equipment to have around. There are numerous uses for this type of electric fan. But first, what is a carpet blower? A carpet blower is constructed from a plastic or other lightweight shell. Many are made out of polyethylene. This is often rotationally molded polyethylene, or other durable varieties of this material. This shell is similar in shape to that of a snail. The sides are open to allow air to be pulled into the device.