Hoi - I use two Nano in the cellar at a rather abnormal humidity (in a growth cabinet with 90-99% condensing artificial humidity and about 10-18°c) and one in the garage (current outside temperature and humidity, like in the garden) and so far the parts run like grandma's waffle iron: Stable.
I can't tell you if it's the same with U6Lite, but if the parts are reasonably safe from dripping water, it should work... Hope it helps and hey, probably everyone else would tell you, it doesn't work. are my experiences, since about 12 months... :) LG