[American Viking]

Well I'm already working on HHO boosting of combustion, but I'm also looking into Cold fog as well.
There are two ways to make cold fog,
1. Is use a ultrasonic cold mist vaporizer. These are touchy when it comes to the water quality used and what additives you can add to keep the water from freezing.
2. Is to use a nebulizer head, this can use tap water but will need an antifreeze additive and a continuous light duty compressor.

Both will require separate reservoirs, re-filling pumps, ducting (or piping) and power to make the "fog". Maybe even an arduino to manage the output via some kind of pulse width output.