Omega Turbo and cold conditions

The Omega has a water mixture i think, could be and issue if it were to freeze.

I have the Daystate 2, i got it last January, it is in my unheated but insulated garage, i never have been concerned about the temp that i have used it, not could i actually tell you what they were, except that i like a cool morning vs a warm afternoon to keep the compressor and tanks cool.