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The medical community has, thus far, pretty much ignored CO. There is a dearth of information on it. Aside from a smattering of papers and studies, consider these points:

CO is a poison

It binds up hemoglobin so it cannot transport oxygen to every cell in the body. Therefore, you begin to get cellular suffocation.

COHb does not help remove the metabolic waste piling up at the curb so to speak. The lactic and pyruvic acid must be cleared by the other pathways resulting in metabolic acidosis.

Listed CO alarm alert algorithms are based off COHb for a smoker- 10%. UL and the great minds of the world are ok with you living day in and out at just under 10% COHb indefinitely.

God designed your cells for a specific oxygenation-At 760 mmHg or torr PO2 your PaO2 runs about 100mmHg O2 normally at rest. Venous CO2 runs btw 30-40mmHg. The resilience of the human body is limited. You can hold your breath for a few minutes. Your body suffers biological death of cells after about 4-6 minutes of cardiac standstill.

They're learning more as we go. The myoglobin in your blood and muscles store CO.

It has limited short term beneficial effects at times in the body, which is why we produce tiny amounts of endogenous CO (in the body) but exogenous CO is harmful. There is no good way to measure, either quantitatively or qualitatively the harm from CO but consider this: All poisoning is dose over time. The longer the body's cells are exposed, the more damage- period. That's all anybody needs to know to appreciate the hazard and the need to prevent, detect, and eliminate.

In Cape May County there were two Full Service fuel dealers that employed their own service technician during my time doing oil burner service there.  There were about 6 other oil only dealers there. One of those full service companies had some techs that knew their stuff.  There was another that had someone that already "Knew it all" and did the majority of that company's oil burner repairs and the occasional boiler replacement.   When that one tech retired, that company got around to contacting me, as a self employed sub contractor, to fill the gap.  I found so many customers that had sooty boilers and furnaces that I could not believe that this company was able to keep their customers from switching to gas.   After 2 years of maintaining these boilers I was able to reduce the fuel usage significantly of many of the customers and management decided that I was not a team player and elected to hire someone in house to do the oil burner work. (long story involved here)

So it is hit or miss when hiring an oil burner service person. For the most part, if you have a family owned oil company (they are becoming rare)  that offers a full service company approach to keeping your oil burner operating dependability and efficiently, that is your best bet for the long run.   If there are several fuel oil only dealers (often called discount oil dealers) in your area and you happen to be using one of those for your fuel delivery, then there should be a self employed oil burner person, or an HVAC or Plumber that has a good oil burner tech that is available to all the customers that need service when their oil delivery company does not offer service and repair for those customers.    I happened to be that HVAC company from 1979 up to 2018.  I worked on customers that purchased fuel from 6 different fuel dealers and was careful to remain neutral when recommending one oil dealer over another.  If you owned an oil delivery company and you sent me your customer for repair or maintenance, I did my best to make sure that person stayed your oil customer. And the fuel dealers recommended me more often that way because they knew that I was not going to lose them any customers because of me or the techs that I employed.   

All that said, Once you find a company with a good burner technician, do your best to stay with that technician. (even if that tech changes jobs and is hired by someone else.)  In the oil burner service business, the technician that is the best often finds that doing the maintenance part of the job is beneath them. As a result you get the rookie that will be doing the maintenance portion of the work and only get the "good at what he does" technician after you have a problem that was not solved by the rookie. That's just the way it is in the trades. We all got to learn somewhere and sometimes that learning happens at the customers home.

All you need is Captain CO's email..Jim Davis has articles on CO going back to the 1960s when he came back from The 'Nam. Hopefully he'll see this. If not, DM me & I'll connect you with him mad Dog

It's against the rules of this site to discuss the pricing of a job like that. Get a couple quotes and you'll know what they are going for in your area.

Unlike any other heating system, steam uses no mechanic distribution ie pump, compressor, blower, to send heat around a building. I hope you enjoy this weeks video.