The exhaust duct can crack, allowing gases to escape inside of the home, posing a carbon monoxide (CO) poisoning hazard that can result in death or serious injury.

1 recalls tagged with this hazard.

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VESTA.DS Recalls VST Brand Tankless Water Heaters Due to Carbon Monoxide (CO) Poisoning Hazard and Risk of Serious Injury and Death2025-10-16

VESTA.DS, Inc., of Ontario, CaliforniaVST gas-fired tankless water heatersThe exhaust duct can crack, allowing gases to escape inside of the home, posing a carbon monoxide (CO) poisoning hazard that can result in death or serious injury.