Haze Base make haze machines that are widely used in the professional event industry to create a continuous flow of haze to enhance lighting effects. The haze is water and glycerol based, with a very long history of safe use in public areas.

The principle of these machines is that they have a continuous low airflow through a large bore diameter heater coil. A solenoid pump pulses small quantities of glycerol/glycol based fluid into the airflow, creating bubbles of fluid that are then atomised as they pass through the heater coil.
The resultant stream of fog is then diluted by a controllable blower to create a continuous haze for enhancing lighting effects.

This new unit is very different from the previous units in many ways:-
It uses a cluster of small motorised air pumps in place of the classic aquarium type.
A directly current heated coiled pipe (possibly stainless steel) instead of a central resistive heating core with the pipe spiralled around it. The low mass heater boasts a 5-second heat-up time.
I'm not totally sure if the control is by a relay or if that is an extra safety layer if it is actually a relay.
Two standard computer style fans instead of the older AC snail blower.
Air intake at the back instead of the side (which is much better for our application.)
A pair of individually controlled stepper driven louvres.
A new and highly concentrated vegan compatible glycerol haze liquid.
A new touch screen interface (I'd prefer a resistive touch version.)
Universal voltage.
Power in/out.
Network in/out.

We've just got these to test on our rig alongside the existing 8 older units.
I'm intrigued to see how they compare.

I made this short over a year ago, but held off releasing it as it was a very new design at that point and I felt it was inappropriate to reveal the secrets contained inside. Now it's been over a year, I'm sure the rivals have bought or hired a unit to take a look inside.
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https://www.youtube.com/watch?v=cw7nscOL-DY