Sonic Fire Tech Included in Los Angeles County’s First-Ever Approved 3D-Printed Concrete Home Permit, Lands NFPA 13D-Equivalent Rating, and Wows San Bernardino County Fire in Live Test

Sonic Fire Tech, a NASA-inspired fire tech startup developing infrasound-based fire defense systems, has reached a convergence of milestones that mark a tipping point for next-generation residential fire protection in California.

The company’s Sonic Home Defense system was included as the voluntary fire protection component in the first 3D building permit ever approved by Los Angeles County for a 3D-printed concrete home, a permit issued to Monrovia-based PCI Builders for a residence in the Eaton Fire rebuild zone. Separately, Sonic Fire Tech has secured third-party validation of its system as a viable NFPA 13D-equivalent alternative to conventional residential sprinklers, conducted a live demonstration before San Bernardino County fire officials that drew significant media attention, and is preparing for its next public showcase in Concord, California on April 29 with the Contra Costa Fire Department.

Included in LA County’s Historic First 3D-Printed Home Permit

When PCI Builders received Los Angeles County’s first-ever approved building permit for a 3D-printed concrete home in late February, Sonic Fire Tech was part of the package in addition to a mandated sprinkler system. The residence, located in the Eaton Fire rebuild zone, integrates the Sonic Home Defense system as its interior fire defense solution, making the infrasound-based technology a component of a fully permitted, construction-ready home in one of the most closely watched rebuilding zones in the country.

PCI Builders, a woman-owned design-build firm led by CEO Allison Allain, developed the home to combine structural resilience with active fire defense. Its 3DCP concrete printing technology produces non-combustible walls in roughly 12 hours for a 1,500-square-foot home. Sonic Fire Tech supplies the interior fire protection layer, positioned as a complement to or replacement for traditional water-based sprinklers.

“The day after the fires, I began researching construction technologies that could help ensure this never happens again to my clients,” said Allison Allain, CEO of PCI Builders. “We cannot simply rebuild the way we always have. California must build smarter, using proven technologies that make homes stronger, safer, and better prepared for the realities ahead.”

The permit’s approval signals that LA County is embracing new technology that benefits homeowners who are rebuilding with more affordable and smarter re-building options. Both the 3DCP construction method and the Sonic Fire Tech interior fire defense are examples of Los Angeles County’s forward thinking code review and alternative methods consideration, a significant threshold in a county where thousands of homes are preparing to rebuild under intense scrutiny of both speed and resilience.

NFPA 13D-Equivalent Alternative: The Regulatory Prize

Beyond the PCI permit, Sonic Fire Tech is working with Fire Protection Engineers and industry experts on its own designation as an NFPA 13D-equivalent alternative to traditional residential sprinkler systems, the standard California requires in newly constructed single-family homes. The designation is the regulatory foothold the company has been working toward, allowing it to be positioned directly alongside conventional, mandated sprinkler systems when homeowners and builders evaluate their options.

The distinction carries real weight. Traditional residential sprinklers activate several minutes only after heat rises to a threshold, can discharge large volumes of water that damage interiors and electronics, and require plumbing infrastructure that adds cost and complexity. Sonic Home Defense, by contrast, deploys in milliseconds and uses inaudible low-frequency infrasound waves to disrupt the chemistry of combustion before flames can spread, with no water, no chemicals, and no risk of flooding the interior of the home being protected. Saving critical time for life safety.

The system operates on backup battery power during outages, activates in milliseconds via infrared detection, and is engineered to be cost-comparable to a conventional sprinkler installation.

“The question we always get is: can your system meet the same standard as a sprinkler?” said Remington Hotchkis, Chief Commercialization Officer of Sonic Fire Tech. “The answer is now officially yes. It provides a smarter option for homeowners, who are today mandated to have sprinklers in their home. This third-party validation changes the conversation entirely for builders, insurers, and homeowners.”

“For communities rebuilding in California’s high fire severity zones, where water infrastructure failed during the Eaton Fire response and where homes are being lost in minutes rather than hours, an interior fire defense system that works without water and responds before ignition can spread is not merely a product alternative. It is a true paradigm shift,” added Hotchkis.

San Bernardino County Fire Puts the System to the Test

In late March, the San Bernardino County Fire Department hosted a live field demonstration with Sonic Fire Tech, setting fire to trees, grease, and a range of other materials and challenging the system to respond in real conditions.

“This technology works without water or chemicals, creating a protective zone that can stop ignition in milliseconds while avoiding the collateral damage often seen with traditional suppression methods,” the San Bernardino County Fire Department said following the demonstration. The department added that the system’s autonomous early detection and rapid suppression capabilities have the potential to reduce fire damage before it starts, particularly in wildfire-prone areas, and that the same technology could be applied inside homes and businesses to stop kitchen or appliance fires at their earliest stage.

Firefighter Ryan Beckers, present during the test, put the insurance calculus plainly. “If you keep a fire small because a fire was detected while it was small, and put out right away, that’s going to save money, that’s going to help with insurance rates,” he said.

“All fires need oxygen to burn. We use infrasound waves, which are inaudible sound waves, to vibrate the oxygen at a rate where fire can’t consume it, and it breaks the chemical reaction,” Hotchkis explained the underlying physics. “The Sonic Home Defense system emits infrasound waves below the threshold of human hearing that oscillate oxygen molecules at a frequency that breaks the combustion reaction without displacing oxygen from the space, which would itself be dangerous.

Next Demo: Concord, April 29, With Contra Costa Fire Department

Sonic Fire Tech brings its statewide demonstration tour to the Bay Area on April 29, 2026, with an event in Concord, Calif., hosted in partnership with the Contra Costa Fire Department. Homeowners, builders, fire professionals, and local officials will be able to observe the Sonic Home Defense system operating in real conditions as an effective alternative to sprinklers and speak directly with the company’s engineers and commercialization team.

The Concord demonstration follows successful showcases across Santa Barbara, Pacific Palisades, and Altadena, as well as the San Bernardino County field test. It represents the company’s first demonstration in the Bay Area, a region that has faced its own devastating wildfire events in recent years.

About the Technology

Sonic Home Defense was developed by engineers with NASA aerospace acoustics backgrounds. The system mounts discreetly in ceilings and other areas of a home, based on NFPA 13D layout standards, and integrates into both new construction and existing homes with accessible attic space. It requires no plumbing, no chemical agents, and no alteration of a home’s aesthetic.

The system detects ignition conditions through highly sensitive infrared sensors and activates in milliseconds, emitting inaudible infrasound waves that disrupt the combustion process before flames can spread. It operates on backup battery power during outages and is designed to be cost-comparable to conventional residential sprinkler installations.

About Sonic Fire Tech

Sonic Fire Tech develops infrasound systems to prevent fires before ignition, using no water, chemicals, or operational delays. Originating in aerospace engineering, the company serves homeowners, public agencies, and critical infrastructure. Headquartered in Cleveland, Ohio, its goal is to advance fire defense. For more information, visit, https://sonicfiretech.com.

Sonic Fire Tech has raised $3.5 million in seed funding co-led by Khosla Ventures, Third Sphere, and AirAngels, and was named a CES 2026 Innovation Awards® Honoree in the Smart Home category by the Consumer Technology Association. To learn more, request a demo, or register for the April 29 Concord demonstration, visit https://sonicfiretech.com. For information on PCI Builders and the 3DCP permitted home, visit https://pci.builders/sonic.

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