Sources of Carbon Monoxide in Your Home

Posted by admin on December 29, 2014

Carbon monoxide (CO) is an odorless, colourless, tasteless gas that can have deadly effects if it leaks into your home. CO poisoning causes hundreds of deaths in Canada every year, with high levels of gas killing in mere minutes.

There are several sources of carbon monoxide in the home. Most appliances produce very little, but those that are not functioning properly can produce life-threatening amounts. To protect your family, it is important you know what appliances may release CO and why.

Sources of Carbon Monoxide


Blockages from soot, leaves, or birds’ nests and cracked stonework can all lead to combustion by-products, the most dangerous of which is carbon monoxide.

Gas Stoves and Range Tops

Most gas stoves and range tops have no vents meaning there is a great potential of these appliances producing carbon monoxide should burners become clogged or dirty. Other factors that increase the risk of CO emissions include incorrect installation, defects, rust, or damage to the appliance.

Wood-burning Fireplaces

If you use your fireplace with the window closed or burn treated or painted wood or scrap lumber, carbon monoxide can accumulate inside.

Gas Log Sets

Gas log sets produce yellow flames that are less efficient and create more carbon monoxide than wood-burning fireplaces. Ventless fireplaces of this type are particularly dangerous as by-products are released straight into the room. Furthermore, as oxygen levels drop, CO levels increase. Gas log sets that lack a sensor to shut the appliance down when oxygen is depleted present an even greater danger to your family’s health. Have your gas fireplace maintained regularly by a professional to avoid any CO leaks.

Fuel-burning Space Heaters

Like gas log sets, many space heaters include sensors that shut off the appliance if oxygen levels become too low. However, space heaters are even higher risk than gas log sets as they may even produce carbon monoxide when there is plenty of oxygen in the room.


There are a number of reasons why a furnace may start to release carbon monoxide including a mechanical failure, a crack in the heat exchanger, problems with the flue, a clogged burner, improper installation, and flood damage. Yellow flames and a buildup of soot are both signs that your furnace requires maintenance.

Water Heaters

Water heaters show the same warning signs as furnaces and CO emissions are linked to many of the same causes including faulty appliances, incorrect installation, flood damage, and blocked burners or vents.

Gas Clothes Dryers

Your clothes dryer may release carbon monoxide if it is damaged, if it installed improperly, if the exhaust pipes are clogged with lint, or if the burner is dirty or blocked.

Vehicles and Equipment

Never leave your car or lawnmower running in the garage, especially if the door is closed, as CO levels can quickly rise to dangerous levels.

Furnaces are one of the main sources of carbon monoxide in the home. It is essential that you have your furnace repaired and maintained regularly to cut the risk of CO poisoning. For all your furnace service needs, contact us at Climate Experts.

call us to get it fixed now 1-855-241-7171

Noel Gingrich
Cody is very professional and knowledgeable. He responded quickly to my enquiry. He worked with us to ensure we could set up the ductwork and venting in a way that maximized the basement.
Noel Gingrich
December 15, 2021.
Tino Cusma
The rep was very professional, he explained in detail what he did and what to look out for in the future. He was very knowledgeable and I would recommend Climate Experts to others in the future and would use them again for all my future HVAC needs.
Tino Cusma
December 10, 2021.
Diane Riddick
The service man was very friendly, and provided lots of info. Very happy we chooses Climate Experts.
Diane Riddick
December 3, 2021.
julie moreau
Climate experts came in for HVAC/boiler maintenance when we moved into our new house. They ended up finding a problem that went undiagnosed by our home inspection that could have been very dangerous. They then ended up installing a new boiler for us super quickly. It was obviously a sudden expense but Climate experts made the whole thing feel a lot better due to their professional and concern for our safety. The new boiler not only works, but is...dare I say...beautiful! The copper piping work that they did is a sight to behold. Who knew that we would be so excited to show our family/friends our cool new boiler. We absolutely recommend these folks—they are reliable, professional, and make even the typically boring part of the house feel nice and pretty. You are in good hands with them!
julie moreau
December 2, 2021.
Avni Shah
Climate experts installed a water tank—the service was super fast and super efficient. The team explained the system to me and the work that they did, making sure I fully understood how to use everything before they left. I would HIGHLY recommend their services!
Avni Shah
December 1, 2021.
mac fine cars
Good company to deal with.
mac fine cars
November 30, 2021.