[Xoner8]

RH is relative to the surrounding air. The colder the air is, the more tightly packed the molocules (leaving less room for water vapor) Warmer air by contrast, has its molocules further apart and is therefore capeable of sustaining (holding) more water vapor. In a sealed environment at a steady RH, if you could cool the air inside of that cabinet without introducing outside air, the RH would increase. Think of it as the cooling air squeezing the moisture out... It is important to mention that some refrigeration units dehumidify by design, like a no frost freezer for example. Hope that helps.