AirTest PT9250 & CO
2
Application Guide
12 of
12
15 cfm/person this is approximately 1100
ppm and for 20 cfm/person the level is 930
ppm.
Multiple Zones Served By One Air Handler
:
This could occur when a number of spaces are
served by a single rooftop or where fresh air to a
floor is controlled separately for each floor. In
this case control modulation of fresh air should
be based on the highest level measured in all of
the spaces served by the air handler.
AirTest also has products that will allow you to
control a VAV box based on CO
2
and
temperature.
Other Equipment:
In a typical CO
2
retrofit you
may also want to include use of Variable Speed
Drives to modulate air delivery. Ideally the
system should be integrated with the existing
building control system. Most major control
manufacturers have CO
2
control routines
available thatwill run with their systems.
Further Application Reference:
AirTest has
numerous articles and application notes available
on CO
2
control systems and their installation. To
download a one-page resource guide to articles
on CO
2
type this link into your browser or click on
the link if this is viewed on your computer.
http://www.airtest.ca/docs/article/co2reference.pdf
© 2003 AirTest Technologies Inc.
For more information On AirTest Products:
Call: 888-855-8880
Visit:
http://www.AirTestTechnologies.com
Email:
info@AirTestTechnologies.com
