Berkley National Insurance Company v. Broan-Nutone, LLC

Background

A Broan-manufactured ventilation fan was installed in the ceiling of a convenience-store restroom. A fire occurred in the fan’s motor on November 20, 2021. Berkley National Insurance Company had insured the store’s owner, Lakes Community Cooperative, paid $2,549,713.32 for fire-related damage, and brought this lawsuit as the Cooperative’s subrogee—that is, in the Cooperative’s place to seek recovery from the alleged wrongdoer.

Berkley’s complaint asserted negligence, breach of warranty, and strict-products-liability claims. During the case, Berkley conceded that it did not have a viable breach-of-warranty claim. At the hearing on Broan’s motion, Berkley also withdrew its design-defect, failure-to-warn, and failure-to-instruct theories. The remaining claims were negligence and strict liability based only on an alleged manufacturing defect.

Manufacturing-defect standard

Applying Minnesota law, the court explained that a manufacturing-defect claim requires evidence that the product was defective and unreasonably dangerous, that the defect existed when the product left the manufacturer’s control, and that the defect proximately caused the plaintiff’s injury. The central question is whether the product departed from its intended design because of a manufacturing, assembly, inspection, packaging, or testing flaw.

Evidence offered by Berkley

Berkley relied on electrical engineer Lucas Choudek. He opined that electrical arcing occurred in the fan’s motor windings, produced heat, and ignited nearby combustible material, including dust and lint. He also opined that the fan’s thermal-cutout device failed to disconnect electrical power before the fire.

The court found that these opinions showed the fan malfunctioned but did not explain why it malfunctioned. Choudek acknowledged that he did not know the mechanical reason the fan operated at an abnormally high temperature. Berkley also acknowledged that the reason the motor and thermal-cutout device failed was unknown. The evidence did not show the fan’s intended design, how this fan departed from that design, or that any defect existed when the fan left Broan’s control.

Choudek additionally testified during his deposition that the thermal-cutout device might have been installed in a nonstandard way that could cause a solder joint to crack or break. The court excluded that opinion because it was not included in his written expert report, as required by Federal Rule of Civil Procedure 26. The court also concluded that, even if considered, the opinion was speculative: Choudek had not seen the device’s installation instructions, testified only that the proposed sequence might occur, and did not testify that it occurred in this fan.

Court’s analysis

The court rejected Berkley’s argument that the fan’s catching fire, by itself, established a manufacturing defect. Under Minnesota law, showing that a product malfunctioned does not establish that it departed from its intended design or that the defect existed when the manufacturer relinquished control.

The court also rejected reliance on the doctrine sometimes called “the thing speaks for itself,” which can permit negligence to be inferred from an accident in limited circumstances. Berkley did not identify evidence reasonably eliminating mishandling or other events during the years between the fan’s installation and the fire. Berkley also identified no evidence that the dust and lint were present when the fan left Broan’s control or that a manufacturing defect caused the accumulation.

The court distinguished several cases involving Broan fans because those cases applied laws from other jurisdictions or different legal standards. The court concluded that Minnesota law required more evidence than proof that the fan caused a fire.

Disposition

The court granted Defendant Broan-Nutone, LLC’s motion for summary judgment. It dismissed Plaintiff Berkley National Insurance Company’s complaint with prejudice and ordered judgment entered accordingly.