The Rotating Power Brush
This video made by Rodtech the manufacturer of the Brush System used by Neat Sweeps clearly displays how this 21st Century rotating brush sweeps very effectively with considerably less stress applied to chimney and lining surfaces.
This ensures little to no damage to new chimneys but more importantly little to no additional damage to older chimneys.
The video also shows how the rotating brush system sweeps all the surface area where in comparison with an old fashioned manual brush the potential for missing large swathes of the surface area is considerable.
A more thorough and safer clean for older chimneys, especially those on chimneys on thatched roofs.