I have installed a cooling fan with a thermostat to reduce the heat that builds in the Equipment cabinet of our RT-210.

• We have found that the Noctua fans are among the best built, quietest, and move large amounts of air. They can be found on Amazon or other online retailers.  Their WEB Page is available at this link NOCTUA 

• 120mm Thermal Control Case Fan  Used in our equipment Cabinet when we had a computer installed. Very quite long lasting.

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• Snyder refrigerator cooling assistant fan replacement

  Quiet much better build. Moves a bit more air.