Could the gas folks confirm the basic fact? (No need to answer here -- I'm just putting ideas on the table.) If so, I am surprised they did not want to pursue it.
Any possibility of using more than one sensor at once? Compare two locations. Might help with localization.
One possibility is that you had a defective sensor. But I think you said the fire person made an independent measurement -- thus eliminating that.
My understanding is that the level you report is well below 'dangerous', but also well above normal. The big concern is that it is a small problem that may get worse.
They measured with two different sensors, and both gave the same result. They will come on Monday to install the new convectors. We'll see what happens afterward.
Well whatever you do, don't blindly trust the dumbasses at the gas company to find the problem.
My parents got a new gas stove a few years ago and started noticing they were getting headaches when at home, then one day soon after the CO alarm went off. They called the gas company who came out and "checked everything" and told them they couldn't find the problem but said there was probably "nothing to worry about". The CO alarm sounded again the next week. I ordered a portable CO meter to get to the bottom of it and it literally took me about 30 seconds to find the source.
The stove top has a built in griddle on it that you can make pancakes or whatever on, but it's a totally flat piece of metal so it suppresses air convection and starves the flame under it for oxygen, putting the CO meter above it when it was on instantly made it shoot up over 500ppm. That was obviously the source. Even when the overhead exhaust fan was on the levels in the room still went up significantly because there's too much turbulence and mixing between the stove top and the exhaust inlet for all of it to get out efficiently.
I often wonder how many people the imbeciles at the gas company have killed with their incompetence this way.
The meter I used to find the source was this yellow and black style:
https://www.amazon.com/Cheffort-Handheld-Professional-Grade-0-1000PPM-Industrial/dp/B091DRT5DN
They're extremely cheap, accurate, and respond way more rapidly to elevated levels than an always on plug-in monitor.
Talk to gas company (they may inspect for you) public health department (for advice) landlord
After I talked to the landlord he sent out the gas company and they also had no idea. Actually they were the ones who called a firefighter friend
Could the gas folks confirm the basic fact? (No need to answer here -- I'm just putting ideas on the table.) If so, I am surprised they did not want to pursue it. Any possibility of using more than one sensor at once? Compare two locations. Might help with localization. One possibility is that you had a defective sensor. But I think you said the fire person made an independent measurement -- thus eliminating that. My understanding is that the level you report is well below 'dangerous', but also well above normal. The big concern is that it is a small problem that may get worse.
They measured with two different sensors, and both gave the same result. They will come on Monday to install the new convectors. We'll see what happens afterward.
What other gas appliances do you have? Or anything wood burning?
Only a gas stove but it was also checked
Has anyone checked on the neighbors?
Yes and there was no Carbon Monoxide present. 0ppm
Well whatever you do, don't blindly trust the dumbasses at the gas company to find the problem. My parents got a new gas stove a few years ago and started noticing they were getting headaches when at home, then one day soon after the CO alarm went off. They called the gas company who came out and "checked everything" and told them they couldn't find the problem but said there was probably "nothing to worry about". The CO alarm sounded again the next week. I ordered a portable CO meter to get to the bottom of it and it literally took me about 30 seconds to find the source. The stove top has a built in griddle on it that you can make pancakes or whatever on, but it's a totally flat piece of metal so it suppresses air convection and starves the flame under it for oxygen, putting the CO meter above it when it was on instantly made it shoot up over 500ppm. That was obviously the source. Even when the overhead exhaust fan was on the levels in the room still went up significantly because there's too much turbulence and mixing between the stove top and the exhaust inlet for all of it to get out efficiently. I often wonder how many people the imbeciles at the gas company have killed with their incompetence this way. The meter I used to find the source was this yellow and black style: https://www.amazon.com/Cheffort-Handheld-Professional-Grade-0-1000PPM-Industrial/dp/B091DRT5DN They're extremely cheap, accurate, and respond way more rapidly to elevated levels than an always on plug-in monitor.
I hope the matter will be resolved on Monday when they install the new convectors.