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DIY Inline Fan for Improved Air Circulation

An inline fan is an essential component for maintaining proper air circulation in indoor gardening and grow rooms. Building your own inline fan can be a cost-effective solution for those on a budget. In this guide, we will walk you through the steps to create an inline fan using a Comair MX2A4 115cfm A/C fan and other readily available materials.

Materials and Tools

  • Comair MX2A4 115cfm A/C fan
  • Two 4" tab collars
  • Pieces of 1/4" sheeting or scrap wood
  • Hole saw (4" diameter)
  • Tin snips
  • Leather work gloves
  • Power drill
  • 3" sheet rock screws
  • Pigtail for fan power connection
Step 1: Prepare the Wood Pieces

Take the scrap wood pieces and cut a 4" hole in each with a hole saw. The thickness of the wood does not have to be precisely 1/4"; any scrap wood piece would work.

Step 2: Modify the Tab Collars

Using tin snips, extend the tab cuts on the two 4" tab collars. This modification is necessary because tab collars are designed for material about 3/4" thick. Be cautious while handling the modified tabs, as they can become very sharp after cutting.

Step 3: Attach the Tab Collars to the Wood

Insert the tab collar into the 4" hole you drilled in the wood piece and fold the tabs back. Repeat this process for the second tab collar. Make sure to wear leather work gloves while folding the tabs to avoid injuries.

Step 4: Assemble the Inline Fan

Stack the two tab collars and the fan in their final position. Using your power drill and 3" sheet rock screws, secure the components together. Be careful not to place your finger in line with the screw when drilling, as the sheet rock screws can easily penetrate the tab collar.

Step 5: Connect the Fan to Your Light and Exhaust Ports

Attach the inline fan assembly to your light and exhaust ports. You may need to modify your light hood to accommodate the inline fan, depending on your specific setup.

Step 6: Attach the Pigtail

Finally, purchase a pigtail for the fan power connection. These are available in different lengths and with 45 or 90-degree heads. Although listed as "Optional Accessories," they are necessary for connecting the fan to a power source. Pigtails typically cost around $1.50.

Conclusion

Building your own inline fan is an affordable and straightforward way to improve air circulation in your indoor garden or grow room. By following these steps, you can create an efficient and effective inline fan that will help maintain the optimal growing environment for your plants.
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