How much space (clearance) do I need around a Huber unit? It is best to have as much space around the Huber unit as possible. However, if you need to position it a small space, please ensure there is sufficient clearance to the ceiling and walls where the machine is sited; the guidelines are as follows: Air-cooled models These transfer all the heat energy taken from the temperature-controlled application into the environment. This warm exhaust air must be able to rise without hindrance. Fresh cool air must also be able to enter the unit. You should leave at least 20 cm space around the air-cooled Huber unit, and at least 70 cm between the back of the unit and any obstruction. Water-cooled models There should be at least 10 cm space around the unit.