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If you depend on a furnace to keep you comfortable during the frigid months of winter, you probably enjoy how dependable and efficient this type of heating is. Furnaces carry a number of advantages over other types of heaters—they can operate in sub-zero temperatures, they’re energy-efficient, and their lack of moving parts means they’re generally extremely reliable. However, with that being said they do have one serious risk: because they generate heat by burning fuel, they create a gas known as carbon monoxide, which can be fatal if ingested in high quantities.

What Is Carbon Monoxide?

Unlike carbon dioxide which is a common part of the air we breathe around us, carbon monoxide is a gas which is extremely harmful to humans and animals. This gas is an unfortunate side effect of the combustion process. When you burn fuel to create heat, you also produce exhaust, or remaining gasses which are produced through the reaction known as combustion. Carbon monoxide is one of these gasses.

However, carbon monoxide is uniquely known as the “silent killer” of gasses. Unlike other gasses in furnace exhaust, carbon monoxide is colorless, odorless, and tasteless, which means it’s invisible, impossible to smell, and can’t be detected by any human senses. In fact, most of the time those who face a serious carbon monoxide problem don’t even realize it until it’s too late.

How to Contain Carbon Monoxide

First, we need to get something out of the way: this is not intended to scare you out of using your furnace or make you rip your furnace out of your home in favor of a different type of heating. Furnaces have been commonplace in homes in some form for thousands of years, and even to this day they’re still some of the best heating equipment we have. In fact, they’re safer today than they’ve ever been because we’ve built our furnaces to be able to contain the carbon monoxide gas. When your furnace creates it, it’s vented into the atmosphere outside where it reacts with oxygen to become carbon dioxide which plants turn back into oxygen.

However, this does mean you need to be alert and recognize that there is a possibility of carbon monoxide entering your home from your furnace. Under normal use, this won’t happen, but over time seals can wear out and small leaks can form which can allow exhaust to escape from its containment and proliferate throughout your home. The two easiest ways to prevent this are simple: have your furnace inspected each and every year, and always make sure your furnace exhaust remains sealed and in good condition.

Your exhaust system takes the gasses from your combustion chamber and vents them into the atmosphere through an exhaust vent which extends from your furnace out through a small pipe in your roof. However, if this exhaust pipe shifts, settles, or becomes otherwise misaligned, a small leak can form which allows carbon monoxide into your home. When you have your furnace professionally inspected, your inspector will take a close look at your exhaust vent to make sure it’s leak free and in good condition, and advise you of any repairs that need to be made for added security.

Always Use a Carbon Monoxide Detector

Finally, even after a thorough inspection and maintenance service, you always want to make sure your home remains protected and you get ample warning if your furnace begins to leak carbon monoxide. That’s why investing in a quality carbon monoxide detector is absolutely invaluable. Carbon monoxide detectors are extraordinarily sensitive to this dangerous gas, and will alert you immediately if they notice even slightly elevated levels of this dangerous gas.

If your carbon monoxide detector near your furnace goes off, you’ll know you have a leak, and you can evacuate your home before the air becomes too dangerous to breathe. If it does, shut off your furnace immediately, open windows in your home to allow fresh air to circulate through, and call a professional to have your furnace inspected right away. This is an emergency which needs to be immediately attended to for your safety and continued use of your furnace.

If you have a problem with your furnace or you simply need to schedule a safety inspection, pick up the phone and call the experts from Arco Home Services at (216) 202-3778 today.

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What Are Customers Are Saying

Great service. Recieved a quote and the issue fixed same day and very friendly and professional servicemen. Would highly recommend and affordable.

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Victoria Philpotts

Victoria Philpotts

September 29, 2026

Andrew is great. We have had a lot of good technicians service us, but we've never had a person so thorough and explain everything so clearly. He also has a really great personality.

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Frank

Frank

September 29, 2026

Jesse was awesome, and did a great job on my PM service. I would highly recommend them and him!

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Richard Gutch

Richard Gutch

September 28, 2026

We contacted Arco Home Services for plumbing repairs. Jacob Adams was our tech. Jacob showed up on time and gave us an estimate for the multiple items we wanted done. He was professional, knowledgeable, and personable. He explained all steps and issues that were encountered and spent close to a day and a half completing the many repairs we requested. He knew what he was doing and worked diligently to make sure that the work was done timely and correctly. I can say it was a pleasure to have him complete the work we needed which included installing a new utility tub with new faucets and shut off valves, new bathroom faucet, installing a new sink with faucet and all plumbing in the second bathroom, repairing a toilet flange and reseating the toilet along with multiple other time consuming items to bring the plumbing in our older home into good working order. I can highly recommend Jacob's work and would ask for him again if I needed any additional repairs done. Thank you Jacob for a job well done.

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R. E. Tesmer

R. E. Tesmer

September 26, 2026

Andrew came out did an outstanding job serving my furnace. I had horrible experiences in the past with a different technician, but Andrew came in and turned my opinion around. Great job !

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Tina Andears

Tina Andears

September 25, 2026

We had a limb fall on our main line and Domenic came out and replace the entire unit. Evan came out and replaced a basement unit. Both were very efficient and polite.

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Annette

Annette

September 25, 2026

Andrew came out and performed yearly maintenance on my furnace. He arrived on time and was very efficient. He informed me my system was in good condition and I am prepared for winter. Highly recommend!

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Kathryn Pierce

Kathryn Pierce

September 25, 2026

The ARCO rep Andrew, that took care of the A/C inspection was knowledgeable, professional and courteous! He answered questions completely!

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Giyate Giyate

Giyate Giyate

September 25, 2026

Kellyed Reyes and Shaun McAlpin were great! Assessed the issue, and shared with me my options.

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Hallie Johnson

Hallie Johnson

September 24, 2026

Arco representative Andrew Corrothers came out to inspect our AC unit and did a great job detailing the issues with our unit. Andrew also provided informative options for our unit and potential replacement options. Definitely a job well done by Andrew. Note: There was no charge for visit, part of my service contract.

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John Alexander

John Alexander

September 24, 2026

Arco is amazing. Our furnace was not working and he had it running withing minutes of being here. Highly recommend.

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Bridgett Jackson

Bridgett Jackson

September 23, 2026

Shauvine & Shaun were Fantastic communicators, arrived promptly & diagnosed my issue quickly and accurately - I will Definitely call your company again because of Them - 5 stars

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Al Brooks

Al Brooks

September 23, 2026

Today I had a visit from Eugene Scott from ARCO. He was very professional and friendly. Very informative and a pleasure to have in my home.

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Thomas Noyes

Thomas Noyes

September 23, 2026

Shaving and Shaun did a great job. They were very prompt and completed the job in good time and very efficiently.

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Aldon George

Aldon George

September 23, 2026

Cliff was awesome. Explained everything and look forward to working with him in the future.

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matt mckenzie

matt mckenzie

September 22, 2026

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