Oftec guy or any plumber to fit oil boiler?

[lame plumber]

They were fitted to mfis back then so not a lot you can do now surely, unless you can prove high co in ambient air in area

 

[Dotty]

Well, fortunately the burner's knackered on this one. Nu Way don't do a direct replacement and have suggested a different manufacturer. MI's have just flown out the window.

If I could find them that is!

 

[WHPES]

Comes under the same requirements as any flueless combustion appliance. The OEL TWAs apply for CO for duration of exposure.

(8 hour TWA OEL is 30ppm)

If the output of CO is always under 30ppm you are OK

 

[Bunker]

 

[WHPES]

Thought everyone did occupational exposures as part of H&S training? Apparently not.

OEL Occupational Exposure Limit
TWA Time Weighted Average

Meaning that the maximum permitted exposure to CO is 30ppm as time weighted average over an 8 hour period.

If an occupational CO monitor shows a consistent level of CO under 30ppm, the HSE deems it acceptable for exposure over a typical 8 hour shift.

There are occupational exposure limits which are higher for shorter periods of exposure, for example up to 200ppm is permitted for a 15 minute exposure period. An example of this may be for a furnace startup where the amount of CO generated initially will be much higher when the appliance is cold but as it heats up combustion efficiency increases meaning dramatically less CO when up to temperature.

I would however warn people against advising customers over exposure levels - analysis and advice should only be given by those qualified to measure, monitor exposure using the correct monitoring equipment (a combustion analyser cannot determine TWAs) and advise. A standard CO meter can give a snapshot of CO levels at any given time and you can advise the customer to undertake exposure monitoring as long as you put in writing that your findings do not constitute a safety check. If you find levels above these you can advise the customer that they have a problem but you cannot on the converse say that a situation is safe if you find levels under.

 

[Bunker]

Whats Health & Safety training?

On a serious note, thanks for explaining.