Mars Hydro 4" Inline Duct Fan and Carbon Filter Combo with Temperature and Humidity Controller DUCTWORK Mycorrhizal fungi are ancient in

Mycorrhizal fungi are ancient in origin and the benefits are boundless

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They are free of prismatic distortion

14” deep

Mars Hydro 4" Inline Duct Fan and Carbon Filter Combo with Temperature and Humidity Controller DUCTWORK Mycorrhizal fungi are ancient inDescription Ventilation System Includes: 4" Inline Duct Fan, 4" Carbon Filter, Thermostat Controller, 25 ft Flexible Duct Tube, 3 Duct Clamps, and 2 Hanging Straps. Smart Operation and Quiet Inline Fan: The Mars Hydro 4 inch inline fan features a PWM controlled EC powered motor and mixed flow design, delivering airflow up to 205 CFM quietly. Controlled by a digital touch screen thermostat controller with a sensor probe, it offers functions such as