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John Galt
Forward, March
Premium
join:2004-09-30
Happy Camp
kudos:8
reply to TheMG

Re: smoke detectors

said by TheMG:

I fully understand what he is asking.

Crap gets pulled into the combustion chamber which burns. Even though you cannot see it, the smoke detector does.

And, as lutful See Profile indicates, other non-combustion particulates can cause false alarms, depending on the detector.
--
Nothing makes an American want to do something more than telling them they can't.


TheMG
Premium
join:2007-09-04
Canada
kudos:3
Reviews:
·NorthWest Tel

said by John Galt:

Crap gets pulled into the combustion chamber which burns.

No.

Combustion gases exit through the flue (chimney or exhaust pipe) to the outdoors. That is, unless there is something seriously wrong with the furnace. So even if the dust somehow does end up in the combustion air intake, the gases will be vented outside anyways.

If you're talking about dust hitting the heat exchanger and burning on the surfaces of the heat exchanger, you're using the wrong words. "Into the combustion chamber" implies that you are talking about the INSIDE of the heat exchanger, where the NG/LPG/OIL burns.


John Galt
Forward, March
Premium
join:2004-09-30
Happy Camp
kudos:8

said by TheMG:

If you're talking about dust hitting the heat exchanger and burning on the surfaces of the heat exchanger, you're using the wrong words.

I acknowledge your more accurate representation of the inner workings and mechanism.

lutful
... of ideas
Premium
join:2005-06-16
Ottawa, ON
kudos:1

Click for full size
I just want to point out that lots of fine dust floating around by itself can cause photoelectric smoke alarms to trigger. This is purely because of light scattering physics. Labs actually test with "ISO fine dust" for calibration.