Haze vs Fog –
There is a big difference between haze and fog. The haze is really designed for lighting and laser shows by putting particles in the air that "hang" around for awhile (provided the air conditioning or the wind doesn't suck them up). Its what makes the laser beams look so cool at a good rock and roll show. The fog machine on the other hand is going to put out a consistent and thick smoke that as it dissipates takes on a more fog-like consistency. Again, the trick is going to be in the wind. Another consideration is the area you want to fog-up. The larger the area and fog volume, the bigger machine you need. Also consider the amount of fog (duration of output). I know I didn't answer the initial question - probably just generated more questions but hope it helps.
Travis "Big T" Russell
Big T Productions Inc
Owner and Operator of "The Plague" and "Camp Nightmare"
Customer Quote of the year: "Damn, I pissed myself"