Hot air output from the nozzle, the lower the temperature rapidly, involving the surrounding air.
If high temperature is more required, please bring a heating subject for the tip of the nozzle close as much as possible.
In addition, the temperature fall will be eased if a hood which prevents involving in surrounding air is prepared.
Even if it uses nitrogen gas for deoxidization heating, since surrounding air is involved in, by the usual method, oxidization cannot be prevented completely.
If a work which does not involve in surrounding air with the hood about this is carried out, a certain amount of deoxidization heating will be attained.