An electric blanket is a bed covering with a built-in heating element so that a sleeper can maintain a desired temperature even in a cold room. Many consumers prefer electric blankets because their use can reduce home heating costs.
The sophisticated temperature controls of modern electric blankets can sense changes in skin and air temperature and adjust settings accordingly.
The most advanced model blankets are programmable, so they can pre-warm the bed at a certain time and shut off at a certain hour.
They are also able to adjust the temperature for the needs of two people in the same bed. Some blankets even compensate for the different heat needs of different parts of the body; for instance, sending more heat to the sleeper's feet while leaving the head area cooler.
Approximately 4.5 million electric blankets are sold in the United States annually.
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