Kevin, it’s made to be buried below frost line, but in serious cold weather it won’t operate anyhow (snow instead of rain).
Mine is in the garage which stays warmer. I plan to insulate the mechanical room.
Dan, I also intend to UV filter before drinking this water. However I have tasted it occasionally, and it is much sweeter now, with just the WISY filter in place (280 microns) Rainwater is already very clean, as we don’t have much air pollution here. It’s really just debris and bird poop etc on the roof that needs addressed. The oxidation from the dissolved air in the incoming water seems to be improving things a lot.