An electric fireplace can be left on for an indefinite period of time. However, with the heating element on 24/7, you will notice a difference in your electric bill.
That being said, many people leave their electric fireplace operating for extended periods of time, with the heat turned off. Much has been said about the spectacular effects of today’s electric fireplaces. The colors, media options and the inexpensive costs to enjoy the light show are reasons enough to keep your fireplace on all the time! Some folks use electric fireplaces as subdued lighting, left on overnight. Many design the media in an electric fireplace to complement their lifestyle! Some use the fire and ice effects as a subliminal cooling effect in the summertime! But one thing for sure, everyone will have their favorite settings and effects and will find a way to enjoy the fireplace!