Skip to main content

21OAK may earn a commission when you buy through links on our site.

How to test for carbon monoxide safely

Carbon monoxide is poisonous when breathed in, and it can be deadly if you’re exposed to it for too long. A carbon monoxide leak is possible in most homes, so it’s a good idea to be proactive about putting preventative measures in place. If you suspect a gas leak, you should immediately get your home tested, but periodic tests are also a good way to get ahead of the problem. We’re going to discuss the dangers of carbon monoxide in your home and how to detect it and test for it to keep your family safe.

Image used with permission by copyright holder

What are the dangers of carbon monoxide?

Carbon monoxide poisoning gradually reduces your blood’s ability to carry oxygen to your body. It’s a dangerous condition because the first signs present as flu-like and include mild nausea, headaches, and fatigue. This makes it seem less than serious and causes people to wait too long to seek medical attention. However, as exposure time lengthens, symptoms intensify, and victims can experience incapacitating headaches, disorientation, loss of consciousness, and even heart failure. Another danger of carbon monoxide is that it’s odorless and colorless, so it’s difficult for people to detect until the leak has become a health risk.

Recommended Videos

Where does carbon monoxide come from?

When fuel burns, it emits carbon monoxide. This means that malfunctions in appliances can produce large amounts of carbon monoxide. Additionally, burning fuel while having poor air circulation can also increase the risk of carbon monoxide poisoning. Some common household items that are potential sources of carbon monoxide are:

  • Gas appliances
  • Water heaters
  • Furnaces
  • Fireplaces
  • Gas-powered vehicles
  • Charcoal grills
  • Wood burning stoves

Telltale signs of a carbon monoxide leak

The first thing you’ll likely notice when there’s a carbon monoxide leak in your home is that everyone, not just one person, is feeling flu-like symptoms. You may even notice that your pets don’t seem to be feeling well. It’s a big red flag when everyone gets sick simultaneously. Additionally, appliances that are leaking carbon monoxide sometimes show signs of their own. These signs include higher levels of condensation around them and yellowish soot on or around the appliance.

Quick test for carbon monoxide detectors

The fastest and easiest way to monitor carbon monoxide in your home is to have working and fully operational carbon monoxide detectors. These detectors are either hard-wired into your electrical system or are powered with batteries. Both types have pros and cons:

Hard-wired detectors

  • Can be connected with one another and sound the alarm on all when one is triggered
  • Will not work when the power goes out

Battery-operated detectors

  • Will work even when the power goes out
  • Require battery changes to remain functional

Whichever power method you choose for your detector, a great function of many models, like

Google Nest Protect

, is that they can be integrated into your home’s existing security system. Many even have dual functions and also detect smoke and heat.

Where to install carbon monoxide detectors

It’s advised that detectors are installed on every floor of the home, including the basement. Additionally, installing detectors in areas where appliances and other items that emit carbon monoxide are housed is a good idea. These rooms include your kitchen if you have gas-powered appliances, over your attached garage door, and especially in your basement. On upper floors that only contain bedrooms, it’s sufficient to install a detector in the hallway connected to all of the bedrooms. This will ensure that the sounding alarm will wake you if there’s a carbon monoxide leak while you’re sleeping.

Since carbon monoxide is lighter than standard air, detectors should be placed high on the wall or on the ceiling. Placing them too low, like near the floor or in a lower outlet, may lead to poor detection.

Image used with permission by copyright holder

Alternate methods for how to test for carbon monoxide

If you suspect a carbon monoxide leak in your home or if you don’t currently have detectors installed, there are a couple of testing methods you could use to gain some peace of mind.

Portable carbon monoxide meter

A portable meter is a handy device to have on hand, particularly if you have multiple gas-powered appliances in your home. You can run this meter in any room in your house or even nearby gas appliances to determine if you have dangerous carbon monoxide levels.

Professional air quality test

If you want a more official comprehensive test run in your home, professional air quality testing companies will come to your home and test the levels of carbon monoxide in the air. They will also give you an analysis of the overall air quality of your home.

Your family’s safety is of the utmost importance. You have smoke alarms and other safety measures in place in your home, and you may even have a comprehensive security system in your home to protect those you love. Since carbon monoxide is virtually undetectable by human eyes and noses, you need to have detectors and testing routines in place to prevent exposure to this common but deadly gas. Keep your family safe and well by being proactive when it comes to carbon monoxide in your home.

Veronica Sparks
Veronica Sparks is a writer from Milwaukee, Wisconsin who loves writing about gardening, home décor, and DIY life. She’s…
How to heat a basement: From budget friendly to total reno
Heating options for your space and budget
Basement with blue walls.

Have you just bought a home with a finished basement? Maybe you put in the work yourself and created some extra living space below ground. Either way, you know that basements can get incredibly cold. Any heat in your home rises, so that could leave your new basement at unbearably chilly temperatures.

To get the most out of this extra space for a home office, kids' rec room, or movie night space, you need to make the conditions livable. So, how do you heat a cold basement? We're going to discuss all the best ways to heat a basement so you can pick the one that's just right for your basement space.
What are the best ways to heat a basement?

Read more
How to insulate your garage door for winter (Your heating bill will thank us)
Sometimes overlooked, garage doors also need to be prepped for winter
Unfocused shot of snow falling on driveway with garage in the background

If you’ve ever stood by an old single-pane window on a cold day, you may have noticed that the cold passes right through it. That’s because glass is a poor insulator, allowing virtually free heat exchange. Similarly, your wood or metal garage door becomes like a wall of ice on freezing cold days, and that cold transfers into the rest of the house. Additionally, your home’s heat escapes through the uninsulated garage door. So, how do you insulate a garage door?

To make your garage more comfortable and save money on your energy bills, you can block out the cold. Follow along as we walk you through the process.
Choose the best garage door insulation

Read more
How much does it cost to refinish hardwood floors? Should you do it?
Budget for sanding, staining, and adding a topcoat — here's what you should know before refinishing your hardwood floors
Couple staining a wood floor

Refinishing your hardwood floors enhances the durability of your flooring while also providing your space with a fresh, good-as-new look. Refinished floors can boost your home’s ROI and enhance your design, making it a great option for homeowners looking to spruce up their space. But how much does it cost to refinish hardwood floors? We dive into everything you should know.
The average cost of refinishing hardwood floors

According to the 2024 data from Angi, the average cost of refinishing hardwood floors is around $1,100 to $2,600. The range can vary from as low as $600 for a simple project, such as recoating, to $4,500, depending on the condition of your hardwood and other factors that may sway your project budget.
What factors affect your hardwood refinishing costs?

Read more