Noise floor removal

[braziliandutchytv]

I would like to use UVR5 to remove the noise floor of my mic recordings. Not the sounds of cars, wind, or other external sources, but the internal static/hiss created by the microphone's circuitry as it records. What models would be best to remove the noise floor specifically? Would the general DeNoise model alone yield the best results for this? Is there already a model available that is specifically trained on noise floors?