Can my furnace be making me sick?

Author: Akeem O'Connell  |  Last update: Thursday, June 19, 2025

While in use, heaters lower humidity levels in your home and force hot air through dusty, dirty vents, filters and ducts, if poorly maintained. Constantly breathing extremely warm, dry air that may contain fungi, mold and mildew from the vents can affect your skin, nose, throat and eyes.

How do I know if my furnace is making me sick?

Symptoms of Heater Sickness

Here are a few common symptoms to keep an eye out for: Coughing and sneezing. Sinus infections. Allergy symptoms.

What are signs of carbon monoxide on a furnace?

Signs That Carbon Monoxide Could Be Accumulating
  • Pilot light frequently blows out.
  • Brown or yellow stains appear around the appliance.
  • Smell of gas or exhaust.
  • Fallen soot accumulating in the fireplace.
  • Stale or stuffy air.
  • Smell of something burning.
  • Excessive condensation on windows around the furnace.

Can fumes from a furnace make you sick?

If your furnace is not burning properly or if the exhaust vent is blocked or damaged, CO can leak into your home and build up to dangerous levels. CO can cause a range of symptoms, such as: Headache. Dizziness.

Is my heating system making me sick?

Carbon Monoxide: If you're using a gas heater, improper ventilation can lead to carbon monoxide buildup, which is dangerous and can cause symptoms like headaches, dizziness, and nausea.

The Most Common Reason Why A Gas Furnace Won't Turn On

How do you know if the heat is making you sick?

Heatstroke
  • Confusion or agitation.
  • Loss of consciousness.
  • Profuse sweating or hot, dry skin.
  • Muscle twitching or seizures.
  • Rapid breathing.
  • Rapid pulse.
  • Very high body temperature.

Can a gas furnace cause illness?

Gas- and oil-burning furnaces produce carbon monoxide (CO). CO is an invisible, odorless, poison gas that kills without warning. Learn quick facts about carbon monoxide poisoning while using a furnace and how to prevent it.

Can furnace cause respiratory problems?

Respiratory Issues

Did you know that an old or broken furnace can be linked to breathing problems among your household? If your heating system isn't working properly, it can pump dust, mold, and other pathogens into your home air supply. This can cause asthma to worsen, and other breathing related illnesses to pop up.

Why does my central heating make me feel sick?

While in use, heaters lower humidity levels in your home and force hot air through dusty, dirty vents, filters and ducts, if poorly maintained. Constantly breathing extremely warm, dry air that may contain fungi, mold and mildew from the vents can affect your skin, nose, throat and eyes.

Can you get co2 poisoning from furnace?

While carbon monoxide is a normal byproduct of the combustion heating process, furnaces are designed to keep this gas enclosed and vent it outside the home. A broken furnace can allow carbon monoxide to mix with the home's indoor air supply, creating a potentially deadly situation.

How do I know if my house is full of carbon monoxide?

Carbon monoxide is invisible, odorless and tasteless. Inspection helps protect yourself and your family. Install a carbon monoxide detector in your house, and plan to check its battery every time you check your smoke detector batteries.

How do you know if your furnace is leaking gas?

Fortunately, gas companies put mercaptan in gas, so you can smell it. This substance makes the gas smell like sulfur, or rotten eggs. This is usually a telltale sign that you have a gas leak in your home. Natural gas is odorless, so if you had a leak without this substance, you wouldn't be able to smell it.

Can a furnace set off a carbon monoxide detector?

At the same time, a furnace naturally produces carbon monoxide on occasion, so if you put the detector too close to the furnace, you will constantly get false alerts.

How do I know if the air in my house is making me sick?

Signs of poor indoor air quality may include excessive amounts of dust or increased difficulty breathing in your home. People with allergies or other breathing problems will often be some of the first to experience the effects of poor indoor air quality. Sometimes you might even smell the problem before you can see it.

How do I know if my furnace is producing carbon monoxide?

Signs of Carbon Monoxide Leaks

Soot: You may notice soot-like stains on your furnace. The soot stain can have a black, brown or even yellow color. Smell: While carbon monoxide doesn't emit odor, it may get accompanied by other exhaust gases that produce an odor.

How do I make sure my furnace is safe?

Gas Furnace Safety
  1. Have your furnace cleaned and checked every year by a NATE-certified technician. ...
  2. Install a carbon monoxide (CO) alarm in your home.
  3. Change your furnace filter regularly. ...
  4. Keep the area around your furnace clean and unobstructed.
  5. Keep the burner area of your furnace clean.

Why do I feel sick all the time?

A person may always feel nauseous due to a lack of sleep, poor diet, anxiety, or stress. These factors can make a person more susceptible to infection and illness. However, always feeling sick can also signify pregnancy or chronic illness. When sick, a person may experience stomach discomfort and vomiting.

What is heater sickness?

But before you fire it up, be prepared that feeling nice and toasty may also come with a stuffy nose, dry throat, cough or even a headache. These cold-like symptoms are referred to as "heater sickness." “This happens because dust, pollen and other allergens accumulate in your ducts during the warmer months,” Dr.

Why is my house making me sick?

Is your house making you sick? Don't be surprised if the answer is yes. Toxins, pesticides, gases, mites, and molds are everywhere, and the more you're exposed to them, the greater your risk for developing the health problems they can cause.

Can furnace fumes make you sick?

Over time, as your furnace operates, dust and debris accumulate within the system, including the burners, heat exchanger, and ductwork. If left unaddressed, these particles can circulate throughout your home, reducing air quality and potentially triggering allergies, asthma, and other respiratory conditions.

How do I know if something is wrong with my furnace?

A gas furnace should have a vibrant or bright blue flame. When you see a weak and wavy or flickering flame, this indicates gas is not being completely burned. Pilot light color changes are another indicator that carbon monoxide is not venting away from the system safely.

Can your furnace cause sinus problems?

“When you turn on your heater for the first time, dust, pollen and other indoor allergens may cause sinus congestion,” says Dr.

How do you know if your furnace is making you sick?

Coughing: You may experience coughing due to a dry throat and nasal passages. Allergies: Your allergies may act up due to allergens, such as dust and pollen, being blown into your air. Headaches: You can suffer from migraines and sinus headaches due to clogged sinuses and smells from mold, fungus, and dust.

Are gas furnaces bad for your health?

Gas furnaces and other appliances can cause outdoor air pollution and harm health. Although venting gas appliances is the best way to reduce risk within the home, emissions don't simply disappear when they make it outdoors, but instead circulate within communities.

Does keeping your house too warm make you sick?

"The mucous membranes can dry out, crack a little, allowing viruses to seed and produce disease," said physician assistant Lou Melini. That is what can happen in a hot home. "To crank it up to 86 degrees, I think that's a bit excessive. It's drying and counterproductive," Melini said.

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