Best 2020 - GreenHouser Hydroponics 4" Carbon Air Filter and Inline Fan 25 feet Ducting with Speed Controller+24 Hour Timer+Hygrometer Thermometer Combo Kit for Ventilation System (4"Filter & Combo)

Best Gardening & Lawn Care 2020 ✔ GreenHouser Hydroponics 4" Carbon Air Filter and Inline Fan 25 feet Ducting with Speed Controller+24 Hour Timer+Hygrometer Thermometer Combo Kit for Ventilation System (4"Filter & Combo). 

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👍[Carbon Filter]:4" Flange: 10"H x 7" D; Changeable Velcro Pre-filter with 2 black elastic bands;Exceptional odor control for better privacy.Inner and outer mesh provides 53% open area allowing increased air flow.

👍[Hygrometer Thermometer ]:The temperature range: -50 ° C ~ + 70 ° C (-58 ° F ~ + 158 ° F).It displays the humidity percentage, time, alarm, indoor and outdoor temperature.

GreenHouser Indoor Gardening & Hydroponics Just hooked it up and so far it works great. Just wish it was a little quieter.

Best GreenHouser Indoor Gardening & Hydroponics Love the product and very happy with it.

GreenHouser Indoor Gardening & Hydroponics 4 Months of continuous run time on the fan with no issues at all. Carbon filter seems to already getting ineffective though but everything else in this kit has been solid