There are three major types of an Anti Freeze
Antifreeze - Wikipedia, the free encyclopedia
The one in your windshield washer is typically Methanol alcohol
The type ion your engine is either of two varieties
Ethylene Glycol which is poisonous and
Proplylene Glycol which is non toxic, and used for instance in RV water supply systems usually is sold in red gallon jugs AND guess what the major ingredient in Water based Fog juice is... Propylene Glycol
Another option used to prevent freezing in water, is to add salt (this is typically used in freezing fish, a high salt solution is uses, which can be cooled well below 32 degrees so the fish freezes in a liquid solution.
I understand that we need to be safe and not have people engage in unsafe practices, BUT we do need to think about our answers.
Most times when we run a water based fogger (*martin for instance) we are using about a 20% Proplylene glycol solution in distilled water