Your Garden Exhaust Fan Setup
Just like a good garden design, a good exhaust fan setup can be broken down into a few easy steps. The basic idea is to...
The Exhaust RunEasy enough...determine where you will exhaust your hot air and than design your garden so the garden grow light is nearby. If the distance is greater than 20 feet, make sure the fan in your exhaust fan setup can handle the extra strain. Try to make the run straight from your lights to the exhaust point.Airflow in the GardenSince hot air rises, you will be removing much more heat from the garden by starting your exhaust near the ceiling of your garden area. This creates a vacuum that naturally pulls cooler, fresh air into the garden area.Use an oscillating fan on the floor to keep the cooler, fresh air moving through the plants and toward the exhaust. Just One More ThingFans are much more efficient at PULLING air than at PUSHING air. With this in mind, the exhaust fan is usually placed right at the point of exhaust. From there it will pull air through your exhaust fan setup (through the light reflector) and out of the garden area.Some Examples
If your garden is in a tight space, like this example, you may need to mount your exhaust fan outside the garden area. Keeping your ballast outside the garden area will help keep the temperature down inside the garden area.
This is an ideal exhaust run. The intake on the exhaust system (the carbon filter) is up high to catch the hottest air. The exhaust run is straight (no turns) and short. If you do not have a carbon filter, simply leave it out of the picture.
If you cannot attach your carbon filter to the ceiling, try to get it as high up in the garden area as possible. Milk crates might come in handy for this. The exhaust setup in this example should be fine.One side note...the examples here are all shown with centrifugal fans. With no carbon filter, these examples would work fine with squirrel cage fans These fans are covered in more detail on my garden exhaust fans page. Return to the Garden Design page
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