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My brother in law was just reminiscing about smoking on planes. Hard to believe that was ever allowed. How on earth did you differentiate smoking and non?

We went to Outback one night and the circulation in the place was taking giant clouds of smoke and pushing them directly into non-smoking. :c

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Discussion Starter · #12 ·
OnePyroTec said:
Being I was still crappin' green during the smoking flight days :cool: Didn't they have to filter the smoke out of the air then? Making it fresh air you were breathing?


wayne... i think the initial ban on smoking on domestic flights was 1990... so you're telling us you're about 15 yrs old :D? and yeah the air was filtered like this: the smokers blew their smoke into the nonsmoking section. the nonsmokers inhaled the smoke and coughed or sneezed it out along with some phlegm. after everyone on the plane inhaled the smoke-air-plegm (SAP) mixture, the air was then filtered as follows:

Cabin Air System Operation Pressurized air for the cabin comes from the
compressor stages in the aircraft's jet engines. Moving through the
compressor, the outside air gets very hot as it becomes pressurized. The
portion drawn off for the passenger cabin is first cooled by heat
exchangers in the engine struts and then, after flowing through ducting
in the wing, is further cooled by the main air conditioning units under
the floor of the cabin.

The cooled air then flows to a chamber where it is mixed with an
approximately equal amount of highly filtered air from the passenger
cabin. The combined outside and filtered air is ducted to the cabin and
distributed through overhead outlets.

Inside the cabin, the air flows in a circular pattern and exits through
floor grilles on either side of the cabin or, on some airplanes, through
overhead intakes. The exiting air goes below the cabin floor into the
lower lobe of the fuselage. The airflow is continuous and quickly
dilutes odors while also maintaining a comfortable cabin temperature.

About half of the air exiting the cabin is immediately exhausted from
the airplane through an outflow valve in the lower lobe, which also
controls the cabin pressure. The other half is drawn by fans through
special filters under the cabin floor, and then is mixed with the
outside air coming in from the engine compressors.

These high efficiency filters are similar to those used to keep the air
clean in hospitals. Such filters are very effective at trapping
microscopic particles as small as bacteria and viruses. It is estimated
that between 94 and 99.9 percent of the airborne microbes reaching these
filters are captured.
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