When Do I Need a Fan


About Hydroponic Fans

When we cultivate plants in an enclosed space like a grow closet or tent, the HID or florescent lights used to recreate conditions of sunlight can greatly affect the environment’s temperature. This added warmth is sometimes helpful in indoor air-conditioned systems or during winter-weather gardening—but if the maintained environment temperature is too warm, it can cause harm to crops. Fans are used to keep airflow moving and control heat. When setting up your system, it’s generally preferable to have fans and lights working together in tandem for ultimate optimization.

Typically speaking, the most reliable and effective means of maintaining total control over your system’s temperature is with an Inline Duct Fan and lighting hood set up. This fan blows directly underneath the hydroponic light to circulate air through the hottest part of your system, balancing it out. To set up an IDF, place the fan at one end of the enclosed garden. There is a hole at this end of the enclosure designed to allow the fan to pull air through of the set-up. The IDF is then connected to the lighting hood through duct work, allowing its airflow to pass directly over the hot lightbulb. On the light’s other end, a second opening allows cool air to be sucked into the enclosure.

While Inline Duct Fans tend to be the most efficient means to eliminate heat in your enclosed garden, other options abound. Box fans, centrifugal fans, rotating fans, clip-on fans, rotating fans, pedestal fans and more are all common options available through Rogue Hydro. Just be sure you have enough air-rotation to keep temperatures stable and provide your plants with a constant supply of fresh air. After all, they need this to grow and flourish as well as light and water!

For optimum growth rates, it is best to keep night temperatures between 21-24 degrees Celsius or 70-75 Fahrenheit. (Below 70 degrees Fahrenheit may affect crop yield and temperatures too high can cause moisture waste.) If you notice that your area is too hot or humid—or if you find mold or mildew on your plants or equipment, this is a good sign that you need more airflow. You’ll either want to add more fans to your system or invest in a stronger one. If the enclosure gets too cold, your humidity drops too low or you find condensation in your nutrient solution, this can be a sign that the fan needs to be turned down.

You can find quality fans online right here through Rogue.

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  • Rogue Staff
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