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We would like to thank Bryan Smith of Home Inspections Plus of NC, LLC, in Franklinton, NC for his help with this video!
https://www.inspectplusnc.com/

Furnaces can malfunction in a variety of ways. But one particular malfunction can have deadly consequences in the form of carbon monoxide poisoning! This short video from The Honest Carpenter will describe how carbon monoxide from our furnaces can infiltrate our homes.

Carbon monoxide is a byproduct of burnt fuel. It is odorless, colorless and tasteless, so people are rarely aware that they are breathing it. Carbon monoxide interferes with our bodies ability to absorb oxygen, causing a lack of oxygen to the brain.

When people suffer carbon monoxide poisoning, they will tend to get dizzy, or experience flu-like symptoms. If exposed to carbon monoxide from a furnace burn for too long, people can die.

WHAT CAUSES OUR FURNACES TO PRODUCE CARBON MONOXIDE?

-Carbon monoxide production actual originates as a bad gas burn in our furnaces--what HVAC technicians call INCOMPLETE COMBUSTION.

--Gas furnace flames should be blue. This color indicates extreme heat and a clean burn.

--These blue flames will heat up the HEAT EXCHANGER in our furnaces. Air entering the house washes over this heat exchanger, picking up warmth to heat our homes.

--When burnoff gases build up in the heat exchanger, the blue jet flames get starved of oxygen. They turn orange and back out of the burn chamber, creating a fire hazard. This is called ROLLOUT.

--The orange ROLLOUT flames are producing higher levels of carbon monoxide!

--If the unit doesn't have proper ventilation, these furnaces gases can get sucked back into the home due to SPILLAGE or BACKDRAFTING.

--Also, if the unit doesn't have adequate air supply, incomplete combustion can occur, as may backdrafting and spillage.

--The bad burns and incomplete combustion can also trigger higher condensation buildup, because water is a byproduct of the burn as well. This excessive condensation buildup in the furnace can lead to corrosion.

--Corrosion in the unit can cause rust and soot buildup as well. Rust and soot can cause the unit to deteriorate.

--In particular, the HEAT EXCHANGER CAN BECOME CRACKED, causing burn gases to spill into the air supply of the home.

WHAT CAN YOU DO TO PREVENT ROLLOUT (AND OTHER PROBLEMS)?

--If your unit is more than few years old, have it serviced by an HVAC technician. Annual service plans are the best way to make sure your furnace is functioning properly.

--Also, be sure that you have WORKING CARBON MONOXIDE DETECTORS in your home. Hard-wired units are best, but many plug-in CO detectors and battery-powered units are available.

Thank you for watching the video! Please be safe and have your furnace inspected this winter season!

Be sure to visit us at The Honest Carpenter website:
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