AC Infinity Automatic Booster Duct Fan, Inline Fan with Pressure Switch, 4-Inch leds You can choose to add

You can choose to add a manual dimmer which enables turning the power down to as low as 10% power for more control when needed

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It’s also equipped with an optional high temp shutdown feature for use with CO2 generators that is designed to save a crop in the event of an exhaust fan or AC failure

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AC Infinity Automatic Booster Duct Fan, Inline Fan with Pressure Switch, 4-Inch leds You can choose to addInline duct fan for boosting airflow in ducting and vent systems to ensure heating or cooling delivery. Automatically activates the ventilation fan by detecting pressure change to eliminate manual adjusting. Differential pressure switch supports mounting in any position to improve directional airflow versatility. Features five fan speed levels powered by the PWM controlled EC motor for more precise ventilation. Duct Size: 4 Dim: 11. 88 x 9. 11 x 9. 25