I am told you cant smell CO

Bob Harper

Please understand: you do NOT have to have aldehydes present to have CO!!!

You can have quantities of CO with no apparent aldehydes present. However, as previously pointed out, if you do have aldehydes then you know you have CO. However, is your nose calibrated to sense levels of CO?
HTH,
Bob

Larry Savino

So I am always told you cany smell CO, But what am I sencing or tasting when

The wife has the oven on with no exchaust fan

You start up a water heater on a cold flue and it spills for the first couple of secounds

You lean over and old hydro therm and the smell you get from the top of the unit.

Your standing out side buy a direct vent fireplace.

Mark Hunt

I smell smoke


While CO is odorless, it isn't the only by-product of combustion.

Aldehydes among other by-products do have odor.

When you're standing outside by a fire, you smell smoke yes?

Hope this helps.

Mark H

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Steamhead (in transit)

And

if you smell aldehydes- which smell similar to, but not quite the same as, raw natural gas as delivered to the house- you DEFINITELY have excessive CO. Have those applinaces tested and repaired.

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Mad Dog_2

maybe not, but I can always taste

the aldehydes which are present when co spills in to a space. Mad Dog

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S Ebels

That is a true statement

CO is a colorless, odorless and tasteless gas. What you smell are the other combustion by products that are present in any flame, be it gas, oil, LP, woodor corn, etc. CO occurs at dangerous levels in any flame that is not operating under the correct fuel/air ratio.

If you smell flue gas in your house, you have something wrong. Period! Get it checked out.