In article ,
Stormin Mormon wrote:

On 9/21/2014 10:26 AM, Kurt Ullman wrote:
Stariwells and such are (under most codes) are not isolated from
ventilation. In fact, in most, especially high rises, are usually
ventilated specifically to remove smoke from the area. (On a high rise
you can't really send the Truckies up to the top floor to cut a hole in
the roof like they do in a house.).


It's been a lot of years, but I remember hearing
of positive pressure stair wells. Someone figured
out to pump outdoor air in, which helps keep the
stairwells smoke free. Not sure anyone does this
now.

WHich is pretty much what I said. Positive pressure VENTILATION.
Although on further review I did do a lousy job of explaining what I
meant..
--
³Statistics are like bikinis. What they reveal is suggestive,
but what they conceal is vital.²
‹ Aaron Levenstein