Firemill Fires Back With a $120 Kitchen Extinguisher That Leaves Nothing Behind

A Swedish industrial design firm has built a $120 fire extinguisher that kills stovetop fires with pure CO2 and leaves no residue — no powder, no chemical salt, no ruined dinner.

The device is called Firemill, and Gothenburg-based Propellor designed it. The price doesn't include the CO2 canister, which the user buys separately. That caveat matters. It's like selling a SodaStream without the gas.

Why does the kitchen need its own extinguisher?

"The majority of home fires begin in the kitchen," Propellor writes. That's the company's claim, and it tracks with what fire-services data has shown for years. Cooking remains the leading cause of home fires in most developed countries.

The problem isn't just the flame. It's what happens after you grab a conventional extinguisher. Standard models load monoammonium phosphate, a chemical salt that coats everything it touches. On a stovetop, that means one fire becomes two losses: the meal is inedible, and the kitchen needs a full scrub-down. You don't want that salt inside your body either, as Propellor bluntly puts it.

Firemill takes a different route.

• Propellant: ordinary CO2 canisters, the same kind used in SodaStream machines
• Discharge: pure CO2 gas
• Residue: none
• Collateral damage: none reported, even to electronics

The electronics point is worth pausing on. Propellor's scenario: your laptop sits on the counter, the pan catches fire, you spray. With a powder extinguisher, the laptop gets a corrosive dusting. With CO2, it suffers no damage. That's the design pitch in one image — kitchen-scale fires, kitchen-scale consequences.

How does it work?

The mechanism is simple enough that Propellor shows it rather than describes it. You load a standard CO2 canister into the Firemill body, aim, and discharge. The gas displaces oxygen around the flame and cools it. No pressurized chemical slurry, no refill service, no servicing schedule tied to a specific vendor's cartridge.

The trade-off is capacity. A SodaStream-class canister holds a fixed, small charge of gas. Powder extinguishers pack far more firefighting mass per unit. Propellor hasn't published discharge-duration figures, effective range, or a rating against recognized fire classifications in the material released so far. Buyers should ask before relying on it for anything larger than a stovetop flare-up.

There's also the question of what CO2 discharge does in a small, enclosed kitchen. Gas displacement works both ways — it smothers the fire, and in a poorly ventilated room it displaces the air you're breathing too. Standard guidance for CO2 extinguishers warns against use in confined spaces for exactly this reason. Firemill's kitchen-first positioning makes that conversation unavoidable, and the company hasn't addressed it publicly yet.

Who is this actually for?

At $120 plus canisters, Firemill sits well above a basic powder extinguisher, which typically costs a fraction of that at any hardware store. What you're buying is the avoidance of secondary damage: the dinner, the counter, the laptop, the cleanup. For renters, small apartments, and anyone who cooks with hot oil regularly, that calculus could work.

What it doesn't replace is a certified, serviced extinguisher for whole-house coverage — and Propellor, to its credit, positions it as a kitchen object, not a fire-brigade substitute.

The design logic is the real story here. Propellor looked at a safety product that everyone hides in a cupboard and asked what would happen if it belonged on the counter instead — visible, attractive, and matched to the most likely fire in the home. Whether consumers will pay a premium for that rethink, and whether Firemill earns certification traction beyond early adopters, will decide if this is a category or a curiosity.