Ventilation and Environmental Control

How Do I Hang a Carbon Filter On My Own?

Carbon filters work best when they are suspended high above your grow room near the ceiling. But they can be heavy and cumbersome to hang, especially if you are on your own. Here we take you through an easy, tried and tested method of hanging a carbon filter solo.

Indoor gardeners sometimes use carbon filters to purify the air in and around their gardens. Carbon filters work in partnership with an extraction fan. The fan’s “sucking” side is attached to the filter like this, so that air is drawn through it. Organic molecules are adsorbed by the activated carbon inside the filter and the exiting air is purified as a result.

Carbon filters are most efficient when positioned above your plants, near the ceiling—the higher the better. But they also tend to be pretty large and heavy. So what’s the best way to install them? First things first: installing your carbon filter should be one of the very first jobs when building your indoor garden. Do it before you hang any grow lights or bring in any plants. The more space you have to move around, the better.Connect your fan and filter together. Make sure that they are rated to work together. A good indicator is the same duct diameter.

Here we’re using a six-inch Phresh Filter combined with a six-inch Hurricane™ inline fan. The Hurricane is rated at 435 CFMs (it can move 435 cubic feet of air per minute) but this Phresh six-inch filter is only rated up to 400 CFM. The Phresh filter’s CFM rating tells us it can clean up to 400 cubic feet per minute. So it the Phresh six-inch carbon filter up to the job? Yes! That’s because carbon filters tend to decrease a fan’s actual CFMs by around 20%—so the Hurricane will only be pulling around 348 CFMs through the Phresh filter, well below it’s maximum of 400.

We’re using Ideal-Air clamps to create an air-tight seal between the filter and the fan. You can use some metallic tape too if you wish. Some growers run ducting between their fan and filter but it’s more efficient if they’re directly connected. Once that’s done, our next job is to hang them from the ceiling. Fix some hooks. Remember, you’ll need to attach ducting to your fan’s exit so try to arrange it so that the ducting will be as simple and straight as possible for maximum efficiency. You’ll also need to be no more than eight feet from your power source or fan speed controller. We’re using screw anchors here as our ceiling is made from concrete. Otherwise, find a wooden beam and make sure your hooks are secure in them.

Next, we take some SunGrip fixture hangers and wrap them around the filter and fan. Carefully lift the filter and fan by the hangers and hook on like this. Now you can simply tighten up by pulling on the cords. You should run your carbon filter 24-hours a day and change it every nine to twelve months. Remember, carbon filters don’t work in high humidity environments so try not to let your relative humidity rise above 70%. For best results connect your extraction fan to a fan speed controller.

Here we’re using a Kronus 2 by Titan Controls which not only controls fan speed, but CO2 and humidity too. And there you have it! That wasn’t so bad was it?