Re: Can't Mix Smoke Models....really?

["Nick Markowitz" <nick-markowitz@xxxxxxxxxxx>]

What the manufactuers are worried about is each manufactuers units voltage
and amperage characteristics are slightly different from the others and they
are worried these differences can cause smokes to false, and or fail to
operate in a timely manneror draw too much power off loop andkeep other
smokes from activating. I have taken over many systems were nothing matches
and everything works and functions but I have seen false alarm problems.
Personally i try to keep everything the same for inventory purpose just
makes it easier .I have never seen a panel fail to function even were there
have been real fire situations  It is more of a liability worry of the
manufactuer.
how ever they never take into concideration the cost of changing every
device in a system especially when a detector is no longer made and 3 or
more smokes need changed then costs start getting expensive.I magine what it
would cost to change out a sytem with 100 smokes
to my knowledge UL nor any one else has ever bothered to look into this
situation to see if it really effects panels etc. But from what i see in the
field it does not and one has to wonder is to just to sell more smokes that
this rule is in place.