A gas insert is a sealed firebox that slides into an existing masonry fireplace and vents up the original chimney, turning a drafty open hearth into a controllable heat source. It is the most common upgrade we install in older homes around Downers Grove and Hinsdale, because the existing mantel, surround and brickwork all stay exactly as they are.Ten models, mostly Travis Industries and Majestic. Fit is decided by the dimensions of your current opening, so measurements come before model choice.






