Cutting height mode, often called the "IHT mode“ is a better choice than the traditional "arc vol¬tage mode" because it is the all important clearance distance between the workpiece and gas nozzle that needs to be maintained not the actual arc voltage. As the nozzle wears, the clearance distance is maintained constant and therefore the clearance for all cuts is identical and the cutting quality is optimised.
It is important to remember that "Cutting Height Mode" also provides protection for your wallet. Because the cutting settings are always correct, the cost of wear and tear on the equipment will be reduced. IHT have already been using this technique in its products for about 15 years, even if others may be claiming it is a recent invention.