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garys_2k
Premium
join:2004-05-07
Farmington, MI
Reviews:
·Callcentric
reply to kkrrazy

Re: smoke detectors

But, of course, none of this has anything to do with the OP's "dirty air intakes." Fine dust in the ambient air? Sure. Dirt on the air handler's intake grille, no. But yeah, of course, smoke IS fine particulates so any such particulates will seem like smoke to the detector.

Bob4
Account deleted

join:2012-07-22
New Jersey
Reviews:
·Optimum Online
said by garys_2k:

smoke IS fine particulates so any such particulates will seem like smoke to the detector.

Not to the ionization smoke detectors (the most common type).

lutful
... of ideas
Premium
join:2005-06-16
Ottawa, ON
kudos:1
said by Bob4:

said by garys_2k:

smoke IS fine particulates so any such particulates will seem like smoke to the detector.

Not to the ionization smoke detectors (the most common type).

That is a common misconception.

"Although this type of smoke detector is quite sensitive to small smoke aerosols, it is also sensitive to other particles that enter the ionization chamber, such as water droplets, dust, and other aerosols that unfortunately create nuisance alarms."

"Although optical smoke alarms are more immune to certain nuisance activation than ionization type smoke alarms because of their insensitivity of very small aerosols, they are generally slower to respond to fires that do not produce large-particle smoke."

Quotes from page 2/3 of the excellent report on present and future home smoke alarms by the US Consumer Product Safety Commission. »www.cpsc.gov/library/foia/foia12···larm.pdf