funktion, advantages ...
► improvement of the air and fumes draft in the chimney
► avoids the infiltration of fume in the living quarters
► improvement of the burning energy conservation up to 40 percent
► improvement of the emission values
► avoids flying sparks
► clearing of the chimney all year
► avoids condensation and therefore wet spots in the chimney and the stonework
► guards against build up of soot in the chimney
► avoids wind breaks into the chimney
► reliable protection from wet conditions and rain
► improvement of the air quality through better burning
► Protection against birds entering the chimney and nesting in summer.