Guidelines recommend not to leave an electric fireplace space heater on while unattended, but how long can you leave an electric fireplace on for?
Electric fireplaces can be left on for as long as required. If an electric fireplace needs to be left unattended then it should be turned off before doing so.
As it’s not recommended to leave an electric fireplace on all night, a good method can be to use the heater on your electric fireplace to bring the temperature up within the room to your desired temperature before going to sleep.
Many electric fireplaces can come with an integrated thermostat allowing you to set your desired temperature for the room.