This fan assisted Mister unit runs on 12v 

Just add plain water to produce smoke / steam effect.
Adding that more realistic effect to your model
Variable fan speed to create preffered output rate

Dimension's
80mm Height - plus 90mm funnel ( SHORTEN TO SUIT )
115mm  Long
66mm  Wide 

Run Time :- estimated 30 - 45 min before top up required

Click on video link for demonstration of effect