Carbon Monoxide Risks in Winter: What Home Inspectors Watch For
During Oregon’s colder months, homes are sealed up tight and heating systems run constantly. While this helps keep homes warm, it also increases the risk of carbon monoxide exposure—a serious safety concern that home inspectors commonly encounter during winter inspections.
Carbon monoxide (CO) is an invisible, odorless gas produced by fuel-burning appliances. Because it can’t be seen or smelled, problems often go unnoticed without proper equipment and regular inspections.
Why Carbon Monoxide Risks Increase in Winter
Winter conditions create the perfect environment for carbon monoxide issues to develop:
- Furnaces, boilers, and fireplaces run more frequently
- Windows and doors stay closed, reducing ventilation
- Snow, debris, or nesting animals can block exhaust vents
Even a properly installed system can become unsafe if venting becomes restricted or components begin to fail.
Common Carbon Monoxide Issues Found During Inspections
During winter home inspections, inspectors often identify conditions that increase carbon monoxide risk, including:
- Improperly vented gas furnaces or water heaters
- Disconnected or corroded flue pipes
- Blocked or buried exhaust vents
- Backdrafting appliances pulling exhaust back into the home
Older homes and recently remodeled homes are especially susceptible, as changes to airflow can affect how combustion gases are expelled.
Carbon Monoxide Detectors: Placement and Maintenance
Carbon monoxide detectors are a critical line of defense. Every home with fuel-burning appliances should have working CO detectors installed:
- On every level of the home
- Outside sleeping areas
- Near (but not directly next to) fuel-burning appliances
Detectors should be tested monthly, batteries replaced as needed, and units replaced according to manufacturer guidelines—typically every 5–10 years.
Heating Systems and Winter CO Safety
Routine maintenance plays a major role in preventing carbon monoxide issues. Before and during winter, homeowners should:
- Have heating systems serviced by a licensed professional
- Keep combustion air openings clear
- Ensure exhaust vents remain unobstructed
Portable fuel-burning heaters and generators should never be used indoors or in garages, even with doors open.
How a Home Inspection Helps Identify CO Risks
A professional home inspection evaluates visible components related to carbon monoxide safety, including heating equipment, venting systems, and detector presence. While inspections do not replace specialized testing, they often uncover conditions that warrant further evaluation or immediate correction.
Winter is one of the most revealing times of year to identify combustion-related safety concerns.
Protect Your Home This Winter
If your home hasn’t been inspected recently—or if you’re purchasing a home during the winter months—a professional inspection can help identify potential carbon monoxide risks before they become dangerous.
Schedule your home inspection and gain peace of mind during the winter season.
Carbon monoxide is invisible—but the risks don’t have to be.