As Michigan homeowners prepare for another Lapeer-area winter, furnace safety deserves more than a quick glance at the thermostat. Carbon monoxide safety should be part of your seasonal checklist: especially before your heating system begins running around the clock.
Carbon monoxide, or CO, is a poisonous gas produced when carbon-based fuels burn. It can come from furnaces, water heaters, fireplaces, generators, vehicles, gas appliances, and other fuel-burning equipment. The danger is that CO is colorless, odorless, and tasteless, so you cannot rely on your senses to detect it.
The good news is that carbon monoxide poisoning is preventable. With working CO alarms, proper equipment maintenance, safe generator practices, and professional venting inspections, you can help protect your household through the heating season.
Know the Warning Signs
Carbon monoxide exposure can feel similar to the flu. Common symptoms include:
- Headache
- Dizziness
- Weakness or fatigue
- Nausea or vomiting
- Drowsiness
- Confusion
- Chest pain
- Loss of coordination
Symptoms may improve when you leave the home and return when you come back inside. That pattern should never be ignored.
CO exposure can be especially dangerous for infants, children, older adults, pregnant individuals, and people with heart or respiratory conditions. If anyone in your home feels sick and you suspect carbon monoxide, treat it as an emergency.
For additional information about CO poisoning symptoms and prevention, review the CDC’s carbon monoxide safety guidance.
If Your CO Alarm Sounds, Act Immediately
Do not silence the alarm and assume it is a false alarm. Do not stay inside to search for the source.
If your carbon monoxide alarm sounds: or if someone has possible CO poisoning symptoms:
- Leave the home or enclosed space immediately.
- Move everyone, including pets, to fresh air.
- Call 911 from outside or from a neighbor’s home.
- Do not re-enter until emergency responders say it is safe.
- Follow medical instructions and contact Poison Control at 1-800-222-1222 if directed.
Opening a window is not enough to make a dangerous situation safe. Carbon monoxide can build quickly and may remain present even after a fuel-burning appliance or generator has been turned off.
The Michigan Department of Health and Human Services provides additional CO emergency guidance.
Install Alarms in the Right Places
Every Michigan home should have working carbon monoxide alarms. Install alarms:
- On every level of your home, including the basement
- Outside sleeping areas
- Near mechanical rooms or fuel-burning equipment, following the alarm manufacturer’s instructions
- In additional locations recommended by your local code or fire-safety professional
Interconnected alarms can provide an added layer of protection because when one alarm detects CO, the others can sound as well.
Test each alarm monthly. Replace batteries as needed, and replace the entire alarm according to the manufacturer’s instructions. Michigan health officials commonly recommend replacing CO alarms every five years, although some models may have different service lives.
A CO alarm is an important last line of defense, but it does not replace proper installation, venting, and maintenance. Even newer high-efficiency HVAC systems require working alarms in the home.
You can also review the CPSC’s carbon monoxide alarm recommendations.
Understand Common Sources of Carbon Monoxide
Most CO concerns involve equipment that burns natural gas, propane, gasoline, oil, wood, charcoal, or other carbon-based fuels.
Common household sources include:
- Furnaces and boilers
- Gas water heaters
- Fireplaces and wood stoves
- Gas ranges and ovens
- Portable generators
- Vehicles
- Gas-powered lawn equipment
- Propane or kerosene heaters
- Charcoal, gas, or wood grills
Never use a gas range or oven to heat your home. Never operate a grill, portable heater, mower, pressure washer, or other fuel-burning equipment inside a home, basement, garage, shed, crawl space, or other enclosed area.
A vehicle should never run inside an attached garage, even if the garage door is open. Exhaust can still enter the home through connecting walls, doors, or gaps.
Generator Safety Is Non-Negotiable
Michigan winter storms can bring power outages, making portable generators useful: but only when they are placed and operated correctly.
The CPSC recommends operating portable generators outdoors at least 20 feet from your home. Keep the generator away from doors, windows, vents, and other openings. Point the exhaust away from the home and neighboring structures.
Never run a generator in:
- A garage
- A basement
- A porch or carport
- A shed
- A crawl space
- Any partially enclosed area
Keep generator exhaust away from furnace, boiler, water heater, and other combustion-air intakes. If exhaust is drawn toward an intake, carbon monoxide may enter through the appliance’s air supply even when the appliance itself is operating as designed.
Do not refuel a hot or running generator. Turn it off, allow it to cool, and follow the manufacturer’s instructions.
Why Annual Furnace Maintenance Matters
Annual Furnace Maintenance is about more than avoiding a cold morning without heat. A professional inspection can identify problems that are difficult to see from outside the equipment.
During a heating inspection, a qualified HVAC professional may evaluate:
- Burner operation
- Heat exchanger condition
- Flame characteristics
- Safety controls
- Gas pressure
- Condensate drainage
- Combustion performance
- Electrical connections
- Airflow and filter condition
- Exhaust venting
- Combustion-air intake
- Chimney or flue condition, where applicable
Blocked, damaged, disconnected, or improperly installed venting can allow combustion byproducts to move where they should not. In a Michigan winter, snow and ice can also obstruct outdoor intake and exhaust terminations.
Schedule maintenance before your furnace is working through the coldest part of the season. If your system is already making unusual noises, producing unfamiliar odors, short-cycling, or struggling to heat the home, request professional furnace repair services rather than waiting for a complete failure.
The Navien NPF Hydro-Furnace Difference
The Navien NPF Hydro-furnace uses a different approach from a traditional forced-air furnace. Instead of sending indoor air directly across a gas combustion heat exchanger, the NPF heats water through a sealed combustion process. The home’s air is then warmed as it passes over a hydronic coil.
According to Navien’s NPF product information, the unit’s isolated combustion design keeps the combustion process outside the indoor air stream. That separation can reduce the risk of combustion byproducts entering the living space when the equipment is correctly installed and maintained.
This is an important design advantage, but we want to be very clear: the Navien NPF does not make carbon monoxide impossible, and it does not eliminate the need for CO alarms.
The NPF still burns natural gas or propane and still requires:
- Manufacturer-approved installation
- Correct intake and exhaust venting
- Proper combustion setup
- Routine professional maintenance
- Clear outdoor vent terminations
- Working CO alarms throughout the home
The NPF may be configured with one- or two-pipe venting, depending on the installation. A qualified professional must determine which setup is appropriate for your home, equipment location, and local requirements.
If you are considering an energy-efficient HVAC system, we can evaluate whether the Navien NPF Hydro-furnace is a good fit for your home and existing ductwork. Its variable-capacity operation and efficiency can support more consistent comfort and lower energy use, but correct sizing and installation matter just as much as the equipment itself.
Repair or Replace? Get the No-BS Answer
A safety concern does not automatically mean you need a new furnace. Sometimes the right solution is a repair, vent correction, control replacement, or thorough maintenance visit. Other times, an aging or unsafe system may no longer be a practical investment.
As a 3rd-generation, family-owned company, we believe you deserve a straightforward explanation of what is happening, what your options are, and what each option may cost. We do not push unnecessary replacements.
Our team can inspect your furnace and venting, explain the findings in plain language, and help you compare repair and replacement options. If replacement makes sense, ask about current coupons and flexible GoodLeap financing options to make the investment easier to manage.
Start with Furnace Maintenance and tune-up service before winter arrives. If you need a repair, replacement estimate, or after-hours help, contact Michigan Heating, Cooling & Plumbing.
Your Pre-Winter CO Safety Checklist
Before the heating season begins:
- Test every CO alarm.
- Replace expired alarms and batteries.
- Schedule professional furnace maintenance.
- Have all fuel-burning appliances inspected annually.
- Check that furnace intake and exhaust pipes are clear.
- Keep snow, ice, leaves, and debris away from vent terminations.
- Never use a grill or fuel-burning appliance indoors.
- Operate generators outdoors and at least 20 feet from the home.
- Keep generator exhaust away from windows, doors, vents, and HVAC intakes.
- Review your household’s emergency plan.
A few minutes of preparation can help protect your home and the people who count on you for a safe, warm winter.
Michigan Heating, Cooling & Plumbing
www.michiganheating.com