iPower 8"550 CFM Inline Carbon Filter Ducting with Fan Speed Controller and Temperature Humidity Monitor Kits, Black

Love this combo. Practically everything you need for regulating a confined grow-space. Perfect for 1000w HPS bulb that inadvertently puts off a ton of heat. Digital humidity monitor is helpful. Didn't think I needed it, but I do. It's nice to know your grow room is at an ideal temperature and humidity, and if it isn't you know adjustments need to be made. Without the humidity reading it's difficult to detect a problem before you start to SEE it in your plants. Ducting is plentiful and thin but durable. Less likely to cut yourself on it compared to most rigid aluminum ducting. Carbon filter is adequate and comes with an optional “blanket” or sheath to prevent further particulates/odor to pass. The variable adjuster knob is nice to choose the speed(low, med, high), however for my 1000w ballast set up I need “high” at all times, no pun. Two thumbs up!