What Is A Co2 Jet Cannon? Definition, Types, and How It Works

A CO2 jet cannon is a fixed, mounted CO2 effect device: a valve, a nozzle, and a housing that fire liquid CO2 on a control signal and produce a white column that vanishes seconds later. The phrase is a mouthful because it stacks two names for the same thing. In the special effects industry, CO2 cannon is the umbrella term for every CO2 device, and a jet is the mounted member of that family. So a jet cannon is a mounted CO2 cannon, which is a CO2 jet. Same equipment, three names.

 

You'll hear more than three. CO2 jet, cryo jet, cryo head, jet cannon, cryogenic fog cannon, stage mounted CO2 cannon. Production crews say CO2 jet. Stage managers and touring production managers who've been around 25 years say cryo heads, and what they want is something reliable that fires every time, with no interest in bells or whistles. DJs and consumers say cryo jet. Architects, contractors, and private clients who saw the effect somewhere say jet cannon or cannon machine, because that's what the caption said.

 

When someone calls CryoFX and asks for a CO2 jet cannon, our first question is the same every time: are you referring to a handheld CO2 cannon or a mounted CO2 jet? About 80% of the time it turns out to be mounted. A theme park called recently asking for jet cannons for a new ride; two questions in, we knew it was mounted units, and the conversation moved to control method. The use is what tells us which unit to send, and we confirm with photos and video before anything ships, which is why a name has never cost one of our clients the wrong order.

 

How a CO2 jet cannon works, step by step

Put a cutaway jet on a bench and here's what you'd see, in order. A CO2 hose enters the housing from a siphon tank and lands on a solenoid valve: a valve with an electrical coil around it, machined to handle liquid CO2 at high pressure. Around the valve sit the circuit boards (power, DMX, sometimes LED), the wiring, the mounts, and the panel jacks for power, DMX in and out, and the LCD panel. Fittings connect the valve to the nozzle. That's the whole machine, and what surprises first-time owners who open one is how simple it is. Everything is modular. If a DMX board fails, you unplug it, replace it, plug it back in.

 

Energize the coil and the valve opens with a click, like the metal tip of a screwdriver tapping a bench. Liquid carbon dioxide at 850 to 900 psi rushes through the orifice and out the nozzle, and the click disappears under a hiss like a giant spray can. The nozzle shapes the stream and creates the air exchange that atomizes the liquid. De-energize the coil and a spring slams the valve shut. One DMX channel, one relay, or one switch does all of it.

 

The white you see is frozen humidity. Liquid CO2 leaves the nozzle at about -78°C (-109°F) and freezes the water vapor in the air around the stream; the frozen moisture is visible for a few seconds and then thaws back out, and the column is gone. To the eye it reads as smoke. Chemically it's frozen water vapor, so the room stays clean: zero combustion products, zero fluid, and a dry crowd. That's also why the same jet looks different in different rooms. Cool, humid air holds the plume longer and denser. Hot, dry air erases it fast. A 2-second blast in San Diego beats a 5-second blast in Las Vegas.

 

One thing a jet cannon cannot run on: a standard gas tank. Only a siphon tank, with an internal tube that draws liquid from the bottom of the cylinder, produces the effect. Connect a regular tank and you get a loud hiss, plenty of pressure, and no plume. The full chemistry is in the pillar, and it's the single most common support call we take.

[EMBED YOUTUBE: HOW A CO2 JET WORKS, WITH VIDEOOBJECT SCHEMA]

What the effect looks, sounds, and feels like

A single jet on a 50 lb siphon tank throws a column 35 to 50 ft high and roughly 4 to 6 ft wide, and conditions push it either way. CryoFX jets time out at about 6 seconds per activation as a safety measure and re-fire immediately. The discharge is loud, a hard hiss that makes operators warn anyone standing nearby before firing.

 

From the dance floor, a jet firing 20 feet overhead lands as an immediate rush of cold air. The space around you drops 30 to 50 degrees for a moment, like a gust of wind on a cold day, and then the room temperature climbs right back. There's a faint smell at high concentration, and it's hard to place: clean and cold, different from anything else in the room. You learn it after enough shows.

 

How long can it run? The tank decides. A 50 lb cylinder holds 70 to 90 seconds of liquid through one jet. We've fired jets back to back for 15 minutes on film shoots and run 5-minute continuous tests, and neither is normal use; hold a valve open that long and it can freeze, and a hose left unsecured under that kind of flow will whip hard enough to hurt someone. Tour staff have lost chunks of ear to whipping hoses. No one disconnects anything under pressure.

 

CO2 jet cannon vs everything it gets confused with

On the phone we keep these to a sentence each. A CO2 jet is the mounted unit; a CO2 cannon usually means the handheld version, though plenty of people use cannon for both. A cryo gun is the handheld, crowd-interactive unit, and the word cryo gun also lives in other industries (medical tissue freezing, pest control, aerospace lens cleaning), so we confirm the caller means special effects.

 

A fog machine burns fluid and makes atmosphere that hangs; a jet fires liquid CO2 that's gone in seconds. When a TV production asks for a sandstorm blown at the camera, the questions that decide between CO2 and fog are how fast it has to disappear, what the temperature and humidity are, and whether there are smoke detectors in play. Gone in a second means CO2. Lingering for a few seconds across 40 or 80 chutes means fog or a simulation jet.

 

Where you'll see one

Nightclubs and dayclubs, DJ booths, concert stages, music festivals, sporting events, theme parks, cruise ships, TV and film sets, corporate reveals. The DJ booth is where the average guest meets the effect for the first time.

 

Kris Mullins, CryoFX's founder, first saw a handheld unit at a friend's rave, a $900 piece of equipment that he recognized on sight as a valve, a hose, and a tank, and the questions that followed (what's in the tank, what's in the hose, what pressure, what temperature) eventually became CryoFX. He'd seen jets in Hollywood clubs while DJing at 16 and 17; there are far more of them now.

 

For the full picture of types, tanks, control, installation, and permits, the complete CO2 jet guide covers the entire category. When you're ready to look at equipment, the current range of CO2 jets for sale is on the CryoFX catalogue.

 

Frequently asked questions

What is a CO2 jet cannon? A mounted CO2 effect device that fires liquid CO2 through a solenoid valve and nozzle on a control signal, producing a white column 35 to 50 ft high that dissipates in seconds. The phrase combines two names for the same device: CO2 jet and CO2 cannon.

 

Is a CO2 jet cannon the same as a CO2 jet? Yes. Jet cannon, CO2 jet, cryo jet, and cryo head all describe the same mounted unit. The different names come from different corners of the industry.

 

What's the difference between a CO2 jet cannon and a CO2 cannon? CO2 cannon is the umbrella term for every CO2 effect device. When someone says CO2 cannon on its own they usually mean the handheld version; a jet cannon is the mounted version.

 

Is the white cloud smoke? No. It's humidity in the air, frozen for a moment by liquid CO2 leaving the nozzle at about -78°C, and it thaws back out within seconds. No combustion, no residue, no smell left in the room.

 

How high does a CO2 jet cannon shoot? 35 to 50 ft from a single jet on a single tank, and higher with stacked supply. Cool, humid conditions stretch the plume; hot, dry conditions shorten it.

 

How cold is the output? About -78°C (-109°F) at the nozzle, warming with distance until it reaches room temperature around 20 feet out. The crowd feels a momentary 30 to 50 degree drop when a jet fires overhead.

 

Does a CO2 jet cannon need a special tank? Yes, a siphon tank (also marked dip tube or liquid withdrawal), which draws liquid CO2 from the bottom of the cylinder. A standard tank delivers gas only and produces no visible effect.

 

Updated - 09/05/26