No need for extra electronic speed controllers or transformers.
Flexibility when the grower needs to make seasonal adjustments.
Convenience: increases the ability to match fans with a larger range of filters.
4 speed bulit-in controller gives you the option to reduce fan speed and control noise when full power is not needed. The fan speeds have been selected for ultimate effciency in that air flow range.
Double moulded polymer plastic housing. Manufactured in Germany with a Swiss made motor. Comes with a mounting bracket.
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