Check for normal wear and tear. Ensure all air flow holes in brick are not altered. Visually inspect the lower burn chamber to make sure all the brick are standing vertically, not tilted or out of place. Replace any firebrick as necessary. Insulation and firebrick are not covered by the warranty. New brick may be obtained by contacting OutdoorBoiler.com Energy.
NOTE: The OutdoorBoiler.com Energy GX series Afterburner utilize firebrick refractory to contain the high temperature burn of the combustion process."