Can furnace fumes make you sick?

Author: Mrs. Patsy Jast  |  Last update: Friday, May 23, 2025

Prolonged exposure to natural gas can cause symptoms such as headaches, dizziness, nausea, and, in severe cases, asphyxiation due to the displacement of oxygen in the air. Preventing gas leaks starts with regular maintenance of your furnace and gas lines.

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 the symptoms of carbon monoxide poisoning from a furnace?

Key points about carbon monoxide poisoning

Most CO exposures happen in the winter. A common source is unvented space heaters. Symptoms of CO poisoning include headache, dizziness, weakness, nausea and vomiting, rapid heartbeat, shortness of breath, seizures, chest pain, disorientation, and loss of consciousness.

How do I know if my furnace is leaking natural gas?

Rotten Egg Smells

The sulfur does smell similar to rotten eggs or dirty gym socks. If you've noticed a suspicious stink in your home, then you may have a gas leak — especially if the smell is strongest near your furnace.

Is it bad to breathe in furnace exhaust?

The Dangers of a Poorly Ventilated Furnace

They produce byproducts such as carbon monoxide that can cause headaches, nausea, dizziness, and fatigue; in high concentrations, exposure can lead to unconsciousness and death. The gas is colorless and odorless, which is why carbon monoxide alarms are required in your home.

Watching A Furnace Run With A Cracked Heat Exchanger

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.

How do you tell if your furnace is venting properly?

Increased moisture within the home is a sign that your furnace venting isn't adequate. Without proper ventilation, fumes from the furnace leak into your home and cause condensation. This moisture is most notable in the morning and when you first turn on your heating unit.

What are the symptoms of breathing natural gas leak?

Symptoms from a natural gas leak may include:
  • headaches, sometimes severe.
  • dizziness.
  • fatigue.
  • nausea.
  • irregular breathing.
  • chest pains.
  • memory problems.
  • blurred vision.

Is it normal to smell natural gas by the furnace?

Sometimes, gas is released from your furnace every time you start it. The odor is usually faint and should dissipate within a short time when you open the windows.

Can a small gas leak make you ill?

Can a gas leak make you ill? Sometimes, a gas leak can cause headaches, dizziness and nausea. If you have mild symptoms they should go away when you leave the home, but it's still a good idea to see a doctor. Breathing in carbon monoxide, meanwhile, can lead to poisoning, which can be fatal.

What are two warning signs of carbon monoxide poisoning?

The most common symptoms of CO poisoning are headache, dizziness, weakness, upset stomach, vomiting, chest pain, and confusion. CO symptoms are often described as “flu-like.” If you breathe in a lot of CO, it can make you pass out or kill you.

What fumes does a furnace give off?

Some of the most common smells a furnace can make include:
  • Burning or Electrical Smells. A burning smell coming from the vents or the unit itself is one of the most common furnace smells. ...
  • Chemical Smell. ...
  • Musty Smell. ...
  • Gas or Rotten Egg Smell. ...
  • Car Exhaust Smell.

How can I tell if my furnace is leaking carbon monoxide?

Warning Signs of a Furnace CO Leak
  • Heavy condensation on the windows (found in the room with your furnace)
  • Yellow or brown soot-like stains found around your furnace.
  • A yellow pilot light (instead of a blue flame)
  • Stuffy indoor air.
  • The smell of gas/burning.
  • The pilot light constantly blows out.
  • Rust found on the vent pipe.

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.

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.

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.

How do you know if your furnace is leaking gas?

Hissing Sounds: If you notice a hissing sound coming from around your gas furnace, this can be a sign that your unit is leaking gas.

What happens if you smell natural gas in your house?

If you smell gas near an appliance, it may be just a pilot light that has gone out or a burner valve that is open slightly. If you find this problem and can fix it, the problem may be solved. If you smell gas inside: Go to a phone that is not near the smell and call your local gas company right away.

Will a CO detector detect a gas leak?

No, carbon monoxide (CO) alarms cannot detect natural gas leaks. They are designed to detect the presence of carbon monoxide, a poisonous gas formed during incomplete combustion of fuels like oil, gas, propane, and wood.

What are the symptoms of gas heater poisoning?

Symptoms of carbon monoxide poisoning may include:
  • Breathing problems, including no breathing, shortness of breath, or rapid breathing.
  • Chest pain (may occur suddenly in people with angina)
  • Coma.
  • Confusion.
  • Convulsions.
  • Dizziness.
  • Drowsiness.
  • Fainting.

How long does it take for a gas leak to affect you?

Severe leaks can cause this problem in just five minutes. The EPA states that exposure to concentrations of nine ppm or more for eight hours is enough to produce harmful health effects for at-risk individuals. Exit the property and call 911 if you suspect your home has a gas leak.

Can you stay in a house with a gas leak?

Here's what you should DO if you smell gas: DO leave the home, building, or area of the suspected leak. Get to a safe area as quickly as possible. After leaving your home, DO call the 24-hour emergency number for Peoples at 1-800-400-4271, or call your local emergency response number.

How do I know if my furnace is backdrafting?

Burner flames yellow instead of clear blue – If the burner flames on natural gas-fired appliances such as your furnace, water heater, or stove are showing as mostly yellow instead of clear blue, this can be an indication of backdrafting.

What happens if there is improper venting of the furnace?

If the furnace exhaust can't provide proper airflow, there won't be enough oxygen for complete fuel combustion. Partially combusted gas molecules can pose a health hazard in your home if the furnace exhaust pipe can't disperse them outside.

How to know if a furnace is safe?

Here are ways you can detect that your furnace has a safety malfunction.
  1. Your carbon monoxide detectors go off. You must have carbon monoxide (CO) detectors in your home if you use natural gas in any capacity. ...
  2. Strange odors. ...
  3. Changes in the color of the burner flames. ...
  4. Loud, persistent clicking sounds. ...
  5. Signs of corrosion.

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