Background of the project:
I am doing my own DIY Keezer (keg freezer) which basically turns a chest freezer into a fridge that will hold kegs with the assistance of a temperature controller. The temperature controller plugs into the wall, the freezer plugs into that, and the temperature controller has a thermal sensor that goes into the freezer.
When building this Keezer, I am adding a riser in between the top freezer area and the lid (which you take off) and install all of my tap handles and gas lines, which essentially creates a large open pocket at the top of the freezer. This dead spot creates a warm climate at the top, which apparently varies depending on the freezer size and who was building it. You can overcome this feat by adding a fan to circulate the air.
Just an FYI, the desired temp will stay around the desired 38° Fahrenheit, it will never truly "Freeze".
I want to use a USB fan. I would like to install a power grommet through the riser, with the plug-in being on the inside of the freezer. The USB fan has a controller on it as well.
So to my question:
Using the products below, will the freezer being at 38° Fahrenheit, cause any negative experiences?