How Fireplace Inserts Work
A fireplace insert is essentially a steel box set inside another steel box that is inserted into a masonry fireplace. Fireplace inserts greatly enhance the efficiency and safety of masonry fireplaces. Traditional fireplaces are not inherently efficient. The efficiency rating of a standard masonry fireplace is between 5-10%. It’s even possible for a fireplace to pull more heat out of your home than it provides when a fire is burning.
