Many masonry fireplace are built with a pre-made steel unit, often called a “heatalator”. These units are prone to rusting especially when the chimney is not covered. When the smoke chamber and shelf of these units rust, holes can develop causing the exhaust fumes to enter into your house. These units have less of a smoke chamber area then a masonry fireplace so when a mason removes a heatalator and bricks up the smoke chamber it will be prone to smoke backing up in your house.
A superior way to restore these rusted out fireplaces is to install a high efficiency high heat output retro fit Bellfires™ fireplace system.These fireplaces heat like a wood stove insert using much less wood then a conventional fireplace. Every component used to build these fireplaces carries a manufacturers lifetime warranty.