they all basically operate similarly. Have your
HVAC technician show you your system and how
the outside air damper works.
Kris Anderson is a professional engineer and pres-
ident of K.G. Anderson, an engineering and consult-
ing firm from Bath, Maine specializing in hands-on
whole building and building-systems problem-solv-
ing. Contact Kris at: info@kganderson.com This
article originally appeared in the Maine Indoor Air
Quality Council's (MIAQC) online newsletter.
Learn more at: https://maineindoorair.org
You may also be surprised to find that your
RTU has no outside air being introduced at all
like this unit I found recently. Not a good situation.
Remember that HVAC systems differ and
yours may look different than these pictures, but
