Sound-powered fire protection startup gets $15M to snuff out fires before they turn catastrophic
Ohio-based Sonic Fire Tech raised $15M led by the O.H.I.O. Fund with Khosla Ventures participating. The startup uses infrasonic sound waves (~20 Hz) to suppress fires without water or chemicals, seeking NFPA approval.
Intelligence analysis by Llama
Sonic Fire Tech raised $15M to commercialize a fire suppression system that uses low-frequency sound waves to snuff out flames in seconds without the water and chemical damage of traditional sprinklers. The Ohio startup is pursuing NFPA code approval and courting insurers for premium discounts.
Imagine a fire alarm that doesn't splash water everywhere, it just turns on a super-low hum that you can't hear. That hum pushes on the flames so hard they go out, like blowing out a candle, but in a few seconds. The company building this just got $15 million to prove it works and to get it approved for use in kitchens, homes, and battery storage rooms.
Analysis
The $15M Round and O.H.I.O. Fund Bet
Sonic Fire Tech's $15 million round, led by the O.H.I.O. Fund with Khosla Ventures participating, follows a $3.5 million seed in October and signals investor appetite for a fire suppression approach that has no real commercial analog. The company claims its acoustic system uses a sound generator to push inaudible infrasonic waves, around 20 Hz, through PVC pipes in the ceiling, bombarding flames the moment sensors detect a fire. CEO Geoff Bruder told TechCrunch the system is the only one that "creates its own suppressant without collateral damage," deploying within seconds. That pitch is what O.H.I.O. Fund and Khosla are underwriting, though the bet is contingent on a regulatory path that is anything but fast. National Fire Protection Association approval typically takes about three years, and while Bruder believes the process will be "significantly shorter than that," the timeline still anchors the company's near-term story.
Remington Bixby Hotchkis and the Commercial Kitchen Pitch
COO Remington Bixby Hotchkis frames the commercial kitchen as the most immediate beachhead. Some 75% of commercial kitchens hit by fire do not reopen, he told TechCrunch, and today's sprinklers often make that worse by soaking electrical equipment and structural elements. Sonic Fire Tech's no-cleanup approach could turn a suppression event from a business-ending event into a minor interruption, and the lab testing process reflects the same advantage: NFPA evaluators "don't have to do cleanup," Bruder said, which the company believes will shorten approval timelines. With roughly 500 jurisdictions already mandating interior fire protection systems, even partial penetration of code-mandated buildings represents a sizable addressable market. Bruder also notes that 50% of home fires start in the kitchen, whether grease or electrical, making a small kitchen-focused system a potential wedge product for residential adoption.
Infrasonic Waves and the Lithium-Ion Question
The most technically uncertain application is lithium-ion battery fires, which are among the most challenging to extinguish. In early tests, Sonic Fire Tech does not fully put out lithium-ion fires but contains them, with Bruder explaining the goal is to "keep the outer casing from lighting fire" and "stop cell-to-cell spread." That containment claim, if validated at scale, would be significant given the rising deployment of battery energy storage and electric vehicles. The company is also developing a system to protect home exteriors in wildfire country, though that work has progressed more slowly while the startup waits for time at a suitable testing lab. Insurer interest is the other commercial lever: Sonic Fire Tech is in talks about premium discounts, and acceptance by the insurance industry could meaningfully accelerate adoption regardless of how quickly the NFPA process moves.
Key points
- Sonic Fire Tech raised $15M led by the O.H.I.O. Fund with Khosla Ventures, on top of a $3.5M seed in October.
- The system uses ~20 Hz infrasonic waves pumped through ceiling PVC pipes to suppress flames in seconds without water or chemicals.
- CEO Geoff Bruder believes NFPA code approval, typically a ~3-year process, will be faster because the system leaves no cleanup.
- COO Remington Bixby Hotchkis says 75% of commercial kitchens hit by fire never reopen, framing a key beachhead market.
- The startup is in insurer talks about premium discounts and sees lithium-ion battery fire containment as a major opportunity.
If NFPA approval moves faster than the typical three-year window and insurers offer premium discounts, Sonic Fire Tech could quickly displace water-based sprinklers in code-mandated jurisdictions. The lithium-ion containment capability alone could open a large battery storage and EV market as the technology scales.
The acoustic system has only undergone limited testing so far, particularly for lithium-ion fires, which the company admits it cannot yet fully extinguish. The three-year NFPA timeline could slip, and the exterior wildfire protection system has already been delayed by lab access, leaving the most technically demanding applications commercially distant.
