Gas Furnaces and Carbon Monoxide: The Risks and How to Protect Your Family

February 06, 2017
Whenever your gas furnace is running, carbon monoxide is being formed. However, there is no reason to worry. It is a natural by-product of the fuel-burning process. As long as your furnace is working properly, it is safely deposited outside your home. Carbon monoxide is kept inside your furnace’s heat exchanger until it is safely forced through the flue vent to the outside. Carbon monoxide poisoning is a result of a malfunctioning gas furnace.

Inhaling too much carbon monoxide blocks the body from using oxygen and can harm the central nervous system and heart. While carbon monoxide poisoning can affect anyone exposed to the gas, it is more risky for people with existing lung or heart diseases, pregnant woman, infants and children. Here are some tips to ease your mine mind and preserve a healthy, comfortable and safe home.

1. Invest in carbon monoxide detectors. Carbon monoxide is a colorless and odorless gas that can’t be detected by humans. Without a detector, it’s nearly impossible to know carbon monoxide is building up in your home. You may be unaware until someone starts showing symptoms of poisoning. Introduce carbon monoxide detectors on every floor of your home, ideally near bedrooms, to be alerted to rising levels before anyone gets sick.
2. Be sure your gas furnace was installed properly. If your gas furnace wasn’t installed by pros, you should have it looked at. The experts at Marcos AC & Heating can make sure your blower motor is installed accurately and that there are no flaws in your ductwork design. Carbon monoxide can build up if there are problems in those spaces.
3. Schedule annual maintenance. Regular maintenance is the best action to take to prevent carbon monoxide leaks from your gas furnace. During a yearly checkup, our experts will clean your system and check it for malfunctions or problems. It’s also a decent idea to have any other gas-, coal- or oil-burning appliances professionally monitored as well.
4. Keep your air filter clean. A stoppage of airflow caused by a dirty filter can cause carbon monoxide to escape your system. Set a reminder on your phone or mark your calendar to routinely check your air filter and clean or change it per the manufacturer’s recommendation.
5. Always rely on professionals to repair your gas furnace and other fuel-burning appliances.


Carbon monoxide can be a serious threat, but you can have peace of mind by taking a few precautions. You’ll always have the pros at Marcos AC & Heating in Houston around to help, too. Give us a call at 713-469-3357 if you have questions or concerns about carbon monoxide or your gas furnace. You can also schedule an appointment using our online scheduler.