The Fan Heat Shield double insulates your in-line duct fans against the heat they generate. This means that less heat finds it way into your room, allowing it to be better carried away by your existing system. This results in a cooler environment, increased plant growth, and more energy savings from increased A/C efficiency. Fits 4", 5", and 6" inline fans
— Ships from Seattle, Washington USA.
For more information, please visit the manufacturer HydroFarm's website.