16 | FEATURE— November/December 2017
T
he technology changes
that have occurred since
I first started conducting
indoor air quality inves-
tigations in the 80's are
impressive. I remember
using CO
2
instruments
that drifted all over the place,
were bulky, and only measured
CO
2
. Typically we had to use sep-
arate instruments including a sling
psychrometer for the other baseline
parameters and then manually
compile this data to assess
the indoor air quality for
comparison to limited stan-
dards. Now we have very
sophisticated devices
that will do multiple pa-
rameters and provide
an amazing amount of
information to help us
assess the indoor en-
vironment. This new
technology is fun to
use and also provides
entertainment to the
occupants when they
start asking if we are
looking for ghosts
or sometimes
Listening, An Indoor Air Quality Tool
That Won't Become Obsolete
By Gary Ritter, CIH, QEP, CSP, LEED AP
