Mobius M108S Trimmer - Fan Housing Duct Adapter Kit
(note, the diameter of the opening for the hose attachment is 8 inches). This duct adapter can be connected to an external filtration system or simply vented outside, if the site permits for that. The key with installing this kit is to ensure that the exhaust hose run does not restrict air flow, hence restricting vacuum. If the exhaust hose has a long run or several turns, it may be necessary to install booster fans along the run to maintain air flow. This is something that a competent HVAC technician can help the end user with. There are a few different ways to assess the vacuum performance of the machine.