Can a Landlord Be Sued for Carbon Monoxide Poisoning? What Renters Need to Know

In December 2025, an 11-year-old boy named Henry Losco died from carbon monoxide poisoning in a Regina, Saskatchewan apartment. His father was hospitalized. In June 2026, his family filed a negligence lawsuit against the property owner. The allegation: the death was preventable, and the landlord failed in their duty to maintain a safe living environment. The same month, a Colorado attorney told news media that the state's tight rental market allows unsafe conditions to go unchecked — tenants afraid of losing their housing don't report problems, and landlords who know the market is competitive have less incentive to maintain properties proactively. Landlord liability for carbon monoxide poisoning in rental properties is not a new legal theory. But it is a growing one — as CO detector requirements expand across states and as more incidents produce documented evidence of landlord negligence. Carbon Monoxide Detectors in Rental Properties: What Landlords Are Required to Do

When a Landlord Is Legally Responsible for CO Exposure

Landlords in the U.S. and Canada have a legal duty to maintain rental properties in a habitable condition. This duty — established in most states through either statute or common law — includes keeping combustion appliances such as furnaces, boilers, and water heaters properly maintained and ensuring that required CO detectors are installed and functioning. Liability typically attaches when three conditions are met: the landlord had a legal duty to act (either from habitability law or a specific CO detector statute), the landlord failed to fulfill that duty, and that failure caused the tenant's injury or death. A landlord who fails to install a required CO detector, fails to maintain a gas furnace, or ignores a tenant's written complaint about a CO concern can be held liable for the consequences — even if they had no direct knowledge that CO was building up in the unit. The Regina case adds a specific dimension: when an appliance failure in a rental unit kills a child, the question of whether the landlord knew or should have known about the hazard becomes central to the legal proceeding. Furnace Carbon Monoxide: Why Your Heating System Is the Biggest CO Risk in Your Home Takeaway: landlord CO liability requires showing a duty, a breach of that duty, and causation — and documented failures to maintain appliances or install required detectors satisfy all three elements.

The Enforcement Gap — Why Legal Requirements Don't Always Protect You

More than 30 U.S. states require CO detectors in some or all residential rental properties. The requirements exist. The enforcement is a different story. Most states rely on complaint-based enforcement — meaning an inspector does not come unless someone reports a problem. In a tight rental market, where vacancy rates are low and tenants fear losing their housing, complaints are underreported. Landlords who know this have a structural incentive to defer maintenance. A Colorado attorney representing tenants in CO cases told media in 2026 that this dynamic — scarce housing plus fear of retaliation — creates a market condition where unsafe conditions persist because the consequences of reporting them feel worse than the hazard itself. The legal framework for renter CO protection assumes tenants will report problems and regulators will respond — neither of which reliably happens in markets where tenants are afraid and inspectors are stretched. The result is that the existence of a law requiring CO detectors in your apartment does not mean your apartment has a functioning one — and the existence of landlord liability does not mean you will receive compensation before being harmed. 3 Madison Apartment Units Evacuated for Carbon Monoxide — August 14, 2026 Takeaway: state CO detector laws and landlord liability rules are legal backstops, not reliable preventive systems — enforcement depends on conditions that frequently don't hold in real rental markets.

What Renters Should Document — Starting Now

If a CO incident does occur, the strength of any legal claim will depend heavily on documentation created before and during the event. Renters who have maintained a paper trail of complaints, responses, and readings are in a fundamentally stronger position than those who haven't. But documentation also serves a more immediate purpose: it establishes a record of the landlord's response — or failure to respond — that can trigger action before a CO event becomes fatal. A landlord who ignores a verbal complaint may respond differently to a written email that exists as a permanent record. In the Regina case and similar lawsuits, the documented failure of the landlord to act on a known hazard was central to establishing negligence. A written complaint that went unanswered is evidence. A CO reading saved on a live-display detector is evidence — a portable detector such as the shows the actual PPM number, letting you photograph that reading and document the concentration in a way a binary alarm never could. A photo of an expired detector that a landlord was told to replace is evidence. The renter who documents consistently is in a stronger legal position after a CO incident — and the renter who documents consistently also tends to be the one who got the landlord to actually fix the problem. Takeaway: written documentation of CO concerns and landlord responses is both your best legal protection and your most effective tool for forcing corrective action before an incident occurs.

Practical Steps for Renters in Any Rental Market

• Get your own portable CO detector — do not rely solely on what the landlord has provided, regardless of legal requirements
• Place it in your bedroom at sleeping height — CO exposure during sleep accounts for a majority of fatal residential poisonings
• Report any CO concern to your landlord in writing — email is better than text for documentation, and always keep a copy
• If you have a live PPM reading showing elevated CO, photograph or screenshot it before taking any other action
• Check your state's specific CO detector requirements for rentals — know whether your landlord is complying
• Ask for proof of furnace and appliance inspections, in writing, at lease renewal — a landlord who cannot provide this is a landlord whose maintenance record is unknown
• If you're in a market where you fear retaliation for complaining, contact your local housing authority anonymously — most take anonymous CO complaints seriously

The Regina family who lost their 11-year-old son is now in litigation with a landlord they trusted to maintain the building where their child slept. Legal accountability, when it comes, comes after. The CO detector you bring into your rental unit works before. The AirShield™ 3-in-1 Portable Carbon Monoxide Detector plugs into any outlet in any rental, requires no landlord permission, and shows the live CO PPM in the air where you are right now — not the air where the landlord's detector is mounted in the hallway. Visit airshield.store.