Thank you everybody for your input. I haven't done anything about the fire but I
think I have figured out what they guy did. Before he started, he adjusted something. I thought it was that gas pressure point because I couldn't see what else he could have been adjusting. But, I've read up on this:
http://www.nationalboard.org/index.aspx?pageID=164&ID=236 and in particular this paragraph:
"The following two major reasons explain why the generation of carbon monoxide occurs in the combustion process:
- improper mixing of the combustion air with the fuel being burned; and
- the lack of complete burning because of an inadequate supply of combustion air to the fuel-burning equipment.
Improper Mixing of Combustion Air and Fuel
The improper mixing of combustion air and fuel is most likely to occur because of the adjustment of certain components that comprise the burner. Given the fact that the majority of burners produced have undergone rigorous development and testing programs, first by the manufacturer, then by an independent testing agency, poor mixing is unlikely to be the result of a design deficiency. It is more likely to be the result of improper field adjustment or "tinkering." However, attention should be directed to ensuring that the burner receives an adequate supply of air to the combustion zone for complete burning to occur. "
I think he maladjusted the fuel/air mixture. On the fire as you see it in the picture is it possible that he did so? If that mixture had been set by the manufacturer it would never have been altered; all previous servicings and inspections would have been fine.
I think my next step is a solicitor, find an independent inspector and see if a fuel/air mixture had been tampered with. Are there, do you know, independent inspectors? Some official body maybe? Or can I get such an inspections for myself? Where would I begin to look?
But, thanks for everything so far. A pity I missed those deleted posts - I could maybe have done with them
; if only to help me know what I'm talking about.