How to build a fog chiller
Recently I started experimenting with fog in my shots. I got this fog machine at my local hardware store for a low price. It’s an entry model, but served its purpose perfetly up to now. However, there was one effect that I just wasn’t able to achieve: fog that creeps along the floor and wraps itself around the figure. My fog always rose up and disappeared quite fast. Even though I was able to haze up the room and create a gloomy atmosphere. But there was this one effect of a low fog that I wanted to have.
So a quick research on the webs brought light into my problem. The fog needs to be cooled down to a temperature that is low enough for it to be heavier than air. Only then it will sink down. So how do I cool down the fog? Build an ice tank, so that the fog can pass through and be cooled down on its way out. It’s simple build that took me less than 30 minutes. Here is how I built my DIY fog chiller:
What do you need?
I went out to my local hardware store and got the following. A plastic box with a lid which serves as the container for the ice, regular plastic hoses and several connectors. One question that popped up was “What if I want both a slowly creeping fog and regular fog that floats through the air?” Buying two fog machines was no option, so I decided to build two branches into the machine.
That is what the T-connector is for. With its help I can build two streams of fog. One that passes through the container full of ice and one that is just regular room temperature fog.
The assembly is straight forward. Cut two holes on each side of the box. Afterwards screw in the connectors and finally the hoses. Proper tools are a good thing to have. I didn’t, so I had to fiddle around and improvise by using a scissor and my trusty exactoknife.
On the other hand I lucked out with my fog machine and the hoses. Their diameter happened to be the same size as the nozzle so I had absolutely no problem fitting them together.
The first test run was to my satisfaction. Here and there I had some leaks which I sealed by using simple tape. The biggest turn down was the box, though. Its lid wouldn’t seal the box completely, so I had massive leaks aroung its border. Of course tape fixes it, but I could have thought about that earlier when I purched the box. So when you’re out there thinking about getting a proper container, make sure that it’s perfectly sealed. Saves you a lot of tape 😉
One thing I love about that design is that I can savely store it away when I’m done using it.
I will upload some of the results that I achieved with that fog chiller in an upcoming post. Stay tuned.