In the summer and winter, an effective means of filtering the air is not a
bad idea. Not smart to open the windows often as the cooling/heating would
increase dramatically. Late afternoon/winter and at dawn in the summer may
work effectively though without increasing the heating/cooling costs
dramatically. Spring and autumn, just open the windows a few times a day
for a complete air replacement, if not left open to begin with. All this
takes some forethought and participation and possibly some minor air
temperature discomfort that may require more clothing for a temporary time
for some.
Areas with high air pollution, vicinity of animal feces odors, and the like
not withstanding. Consider moving, or live in the closed environment with
its potential air dangers and equipment to remove those dangers.

--
Lil' Dave
Beware the rule quoters, the corp mindset, the Borg
Else you will be absorbed
"Rob Lamoureux" wrote in message
.. .
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