What are electric fireplace inserts?

An electric insert fireplace is a type of electrical unit that is typically used to convert an existing wood or gas fire opening into an electric fire opening.
These inserts (or insets) are designed to fit seamlessly into the existing fireplace. They can then be plugged into a nearby electrical outlet or hardwired into the electrical system for a more polished appearance.
If there are any gaps, they can be easily filled by using a surround trim.
Electric fireplace inserts are especially well-suited for homes that already have a chimney breast with a fire surround or a hole where an open fireplace once stood. It means that people can re-use a fireplace that would otherwise be obsolete.