Quote Originally Posted by sirheck View Post
Water freezes around 32f or 0c but if your system is on the freezing temp would be a little lower, not sure how much lower though. Maybe like
25f. But below 20f i would imagine it would freeze even with the
system running.

I have had my pump start sounding like a slushy machine before from
chilled cooling, one of the reasons i went with nano fluid.
If the OP is in South Florida, it will never get within 5-7c of 20.

OTOH, garages are prone to all sorts of disasters I'd hate to have my PC in the vicinity of, let alone the dust, sand, bugs, lizards, spiders, etc., etc., etc. we're known for down here...