Bondtech CHT® nozzles split the filament into 3 thinner strands allowing to melt the material from within. In doing so, the material melts faster and higher flow rates can be used.

The video shows a duel between two 0.6mm nozzles on a Prusa MK3S with the Bondtech upgrade. On the left, a plain coated nozzle. On the right, a Bondtech CHT® nozzle. The model is sliced so that there is a slow increase in speed and flow from 17 to 26 mm^3/s. The same G-code is used for both print jobs. Both nozzles work well up to 19mm^3/s. Above this speed, the performance differences are clearly visible.