How to Choose the Right Security Fog Machine: 2, 4 or 6 Cans Configuration Guide
The most common sizing question we receive from installers and shop owners is how many fog canisters their Security Fog Machine actually needs. With our SF-6 platform the question becomes simple, because one machine offers three selectable modes (2, 4 or 6 cans) on the same housing — you change the bank size with a single rotary switch indicated by the front-panel LED.
Step 1: Calculate the protected volume
The right Security Fog Machine size is determined by the volume of the protected space in cubic meters (m³), not just the floor area. Multiply length × width × ceiling height. A 10×8 m showroom with a 3 m ceiling is 240 m³. A 20×15 m warehouse with a 4 m ceiling is 1,200 m³ (you would need either a 6-can SF-6 plus a second unit, or partition the space into zones).
Step 2: Pick the can count from the volume
| Mode | Covers up to | Typical floor area at 3 m ceiling | Best for |
|---|---|---|---|
| 2-cans | 200 m³ | < 70 m² | Jewelry counter, pharmacy cash desk, strong room, ATM vestibule |
| 4-cans | 400 m³ | 70–140 m² | Open showroom, small game room with 4–8 VGTs, mid-size retail |
| 6-cans | 600 m³ | 140–220 m² | Warehouse, sweepstakes parlor, large showroom, casino floor zone |
Step 3: Mount it where it actually matters
A Security Fog Machine should be aimed at the entry path the intruder will use, not at the back wall and not at the goods. The fog needs to bloom between the intruder and what they came to take. Mount the nozzles between 2.0 and 2.5 m off the floor, pointing slightly downward toward the entry vector. In game rooms with multiple VGTs, mount the unit behind the bank of machines so the fog fills the customer aisle in front of them.
Step 4: Get the trigger logic right
Configure your alarm panel to fire the Security Fog Machine only after two-sensor verification: e.g. glass-break + interior motion, or door contact + PIR. This eliminates false discharges from a single nuisance sensor and protects your refill costs. For unmanned game rooms, also wire a hold-up panic button at the cashier so staff can pre-trigger the fog if they spot a hostile party approaching.
Step 5: Plan your refill economics
Sealed canisters like our SF-C01 let you do partial discharges — the machine fires only the cans needed for the alert and leaves the rest sealed and armed. After an event, replacement is a 60-second swap, with no recalibration required. Stock at least one spare canister per machine on site so you’re re-armed before the police even finish their report.
Step 6: Climate and power
Verify your Security Fog Machine’s operating temperature range matches the environment. Anwu SF-6 is rated −5°C to +50°C ambient (storage −20°C to +60°C). For locations with unstable mains power, add a 12V battery backup to the alarm panel — the SF-6 itself uses an internal capacitor reserve good for one discharge even if mains is cut.
Common sizing mistakes to avoid
- Picking 2-cans for a 4-cans room. Under-sized fog dissipates into the room volume too quickly; visibility partially recovers before the police arrive.
- Mounting at the back wall. The intruder is silhouetted against the fog instead of being engulfed in it.
- Triggering on a single sensor. False trips waste cans and erode confidence. Always use two-sensor verification.
- No second unit in long rooms. A 30 m-long warehouse needs zoned protection; one Security Fog Machine cannot fog the full length evenly.
Still not sure? Send us your floor plan via WhatsApp or e-mail. Our engineers will size your Security Fog Machine project free of charge.
