WHAT IS A FIREPLACE INSERT?
If your current house already has a fireplace, but you want to upgrade it with the latest technology and style then you want an insert. Inserts are units designed to fit inside existing fireplace boxes. The insert must be the proper size to work safely. To determine what size insert you need look at SIZING in the FAQ & BUYING GUIDE.
Inserts are available as wood-burning, gas, pellet, or electric units. All types of inserts, except electric inserts, will require a chimney or other type of vent to allow the combustion by-products to be removed safely.