9
F
eatures
The INTERNAL and EXTERNAL CATEGORY of the fan can be different accord-
ing to the different risk AREA INSIDE or OUTSIDE the fan.
The basic rule between the INTERNAL and EXTERNAL category is as follows:
- For fans that are not fully ducted, consider the same CATEGORY of the fan.
- For fully ducted fans but in closed or poorly ventilated environments, consider
the same CATEGORY of the fan.
- For fully ducted fans, in environments that are not closed or closed but poorly
ventilated, one different CATEGORY between INTERNAL or EXTERNAL of the
fan can be considered.
Summary of Contents for CH Series
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