How to Use Rhino Hobby Carbon Filters
Rhino Hobby carbon filters must be matched to the fan that they are being used with in terms of the diameter of the venting and the air flow rate. If the air-flow rate of the fan is too high for the filter then the air will flow through it too quickly to be cleaned properly. Also, if the vent diameters of the fan and the filter are different then it will not be possible to connect them without the use of a ducting reducer or enlarger.
Before use, the plastic wrap should be removed from around the outside of the drum and then the supplied dust filter sleeve should be fitted over the outside. The Rhino Hobby carbon filters are shipped with the duct coupler part-screwed on the wrong way around to reduce the size of the packaging. Using an appropriate sized screwdriver, take out the screws holding the duct-coupler in place. Turn the duct-coupler over and replace the screws so that the duct-coupler sits firmly against the seal. Do not overtighten.
The Rhino Hobby carbon filter needs to be mounted inside or as close as possible to your grow-space and connected to your extractor fan by means of ducting and Duct Clips or by a fast clamp which joins the filter and the fan directly together. However they are fitted together it is essential that all joins are airtight for the fan and filter system to work effectively. The outside of the filter should not be covered or obstructed as this will reduce the extraction rate and the filter’s efficiency. Smaller carbon filters and fans are commonly fitted into grow-tents and grow-rooms by hanging them from hanging bars or ceiling fittings. In this way they do not reduce your amount of available floor-space and they will remove the warmest air which tends rise. Larger carbon filters may be too large and cumbersome for hanging and can be simply sat on the floor. Once the filter and your fan have been located in your grow-space then ducting can be run from the outlet side of your extractor fan to outside of the grow-space. In this way, hot, stale and CO2 depleted air are removed from the grow-space and smells are removed from the exiting air at the same time.
Rhino Hobby carbon filters are designed to be fitted to the intake side of your extractor fan and should never be fitted to the outlet side. In other words air must be sucked through them and never blown out through them. Blowing air through them will make them ineffective and may even damage them internally. The dust-filter around the outside should be removed and washed when it gets dirty in order to maintain air flow.
Moisture degrades the performance of carbon filters. High humidity makes them ineffective at eliminating smells and reduces the expected life-span by a significant amount. Try to always keep humidity at a reasonable level (between 40% and 60%) and both your carbon filter and your plants will benefit.
Every 8-12 weeks the duct-coupler at one end and the bottom at the other end need to be swapped over. This evens out the wear at each end of the filter. If the ends are not changed every 8-12 weeks then the Rhino Hobby carbon filter will not last the full 9-12 months expected lifespan.
Turning the filter around is a simple process. Using an appropriate screwdriver, take out the screws holding on the duct-coupler and at the other end, the screws holding on the bottom. Re-attach the bottom to the end where the duct-coupler was and re-attach the duct-coupler to the end where the bottom was.