Seasonal CO Safety Check

Carbon monoxide risks change with the seasons — and so should your safety habits. Over a third of all unintentional CO deaths in the United States occur during December, January, and February, when heating systems run continuously and homes are sealed against the cold. But CO is not only a winter problem: summer brings generator use during hurricane-season power outages, boating risks, and camping with gas equipment; fall brings first-furnace-use hazards; and spring brings blocked vents from winter debris and animal nests.

Most seasonal CO incidents follow a predictable pattern: a maintenance task was skipped, a vent was blocked, or equipment was used in the wrong place. These are preventable failures — but they require awareness of what to check and when.

This 2-minute seasonal check evaluates your home across four dimensions: heating system readiness, ventilation and vent clearance, generator and outdoor equipment safety, and detector and emergency readiness. You will receive an overall seasonal preparedness score and a specific action list for the current time of year.

Note: This check provides general seasonal safety guidance based on CPSC, NFPA, CDC, and FEMA recommendations. It is not a substitute for a professional HVAC inspection.

In 2 Minutes

• 36% of CO deaths occur in winter (December–February), but risks exist in every season.
• January is the deadliest single month for CO poisoning in the United States.
• The first furnace use of the season is a high-risk moment — cracked heat exchangers may have developed over summer.
• Snow and ice blocking exterior vents is a leading winter CO cause that homeowners often overlook.
• Hurricane-season generator misuse causes a spike in CO deaths every year.
• This check scores your readiness for the current season across heating, ventilation, equipment safety, and detector preparedness.

What This Check Covers

• Whether your heating system has been professionally inspected for the current season.
• Whether exterior vents, chimneys, and flue pipes are clear of seasonal blockages.
• Whether you have a generator or outdoor fuel-burning equipment and how you plan to use it.
• Whether your CO detectors are functional, within their rated lifespan, and have working batteries.
• Whether you have a CO emergency plan that your household knows.
• Season-specific risks based on the current time of year.

Start the Check

How to Interpret Your Result

Your answers are scored across four seasonal safety dimensions: heating readiness, ventilation clearance, equipment safety, and detector/emergency preparedness.

• Seasonally Prepared (80–100%): Your home scores high across all four seasonal CO safety dimensions for the current time of year.
• Mostly Ready (60–75%): Solid seasonal foundation, but one or two areas need attention for the current time of year.
• Seasonal Gaps Found (40–55%): Multiple CO safety gaps relevant to the current season. The combination creates meaningful seasonal risk.
• Immediate Seasonal Action Needed (0–35%): Significant CO safety gaps across most or all seasonal dimensions. Your home is not adequately prepared for the CO risks of the current season.

Sources & References

1. CPSC — CO Information Center . Annual CO death reports, seasonal press releases, 50%+ product CO deaths Nov–Feb.
2. CDC — CO Poisoning Prevention . ~400 deaths/year, 100,000+ ER visits, seasonal prevention.
3. USFA/FEMA — Carbon Monoxide . 150+ non-fire CO deaths/year, alarm placement, free safety materials.
4. Ready.gov — Winter Safety . CO prevention within broader winter preparedness.
5. NFPA — Carbon Monoxide Safety . Education hub, CO alarm requirements, joint CPSC/NFPA toolkit.
6. American Red Cross — CO Preparedness . Downloadable household CO checklist.
7. CDC MMWR — Hurricane Irma CO Deaths . 16 CO deaths from Irma (more than direct storm deaths).
8. American Lung Association — CO Safety . 50,000+ ER visits/year, winter-specific tips.
9. UL Standards & Engagement — UL 2201 Generator Standard . Generator CO emission standard, state CO safety report.
10. Minnesota Dept. of Health — CO in Your Home . Covers both winter and summer CO risks including recreational activities.