2025 Mars Hydro 4" IFresh Smart Inline Ducting Fan & Carbon Filter Combo Ventilation System for Grow Tent Cooling Booster

WIDE APPLICATIONS - Maintain a healthy grow room by efficiently moving large volumes of air through your ventilation system; Ideal solution for multi-purpose use in residential and commercial ventilation, transfer of hot/cool air, or circulation EFFICIENT FAN - Combines the features and benefits of an axial and a centrifugal fan to effectively circulate air throughout your room to improve odors and freshen air; Variable speed controller with three speed switch (low, medium and high) for adjustment as needed ADVANCED CARBON FILTER - Air carbon filter is utilizing Australian raw carbon with stunning odor absorbency; Filters out cigarette smoke, plant based allergens, and mechanical residue, fumes, or any other foul smells at your house, workshop, business, etc Ultra Reliable & Accurate Thermometer & Hygrometer: Quickly report measurements every 10 seconds and has a wide measurement range from 14℉ to 122℉（-10℃~50℃), with a temperature accuracy range of around ±0.1℉ (±0.1℃). Humidity sensor measures humidity from 10% to 99% with a humidity accuracy range around ±5%.