design inadequate for the current needs of the

design inadequate for the current needs of the
building and its occupants;
• The system may not have been installed as
designed, or commissioned so as to assure that its
operation met the design objectives; and
• Mechanical deterioration and/or physical damage to
system components may have degraded their
performance to the point where they cannot provide
the necessary level of air flow or capacity.
The description of what constitutes an adequate
engineering evaluation of HVAC system condition and
capacity is beyond the scope of this standard. It is
recommended that qualified engineering professionals or
HVAC contractors be consulted for such an evaluation.
4 Project Evaluation and Recommendation
When contamination is identified or other criteria
triggering cleaning in Section 3 are met, it is highly
recommended a project evaluation take place prior to
initiating cleaning work. The project evaluation includes
three steps: 1) determining the building usage by
classification; 2) identifying the type of contamination
present in the HVAC system; and 3) conducting an
indoor environmental impact survey.