Hiring an outside firm to conduct the audit and prepare all of the required documentation can reduce the burden on in-house staff if you don’t have the resources. Most professional firms are quite familiar with the technical aspects of the I-BEAM forms, though they are not necessarily accustomed to performing the non-technical aspects of the audit that are required in order to earn this credit. Make sure the outside auditor has a copy of the I-BEAM forms so they can adjust their canned IAQ audit materials accordingly.  Be sure to work with these firms to create the required IAQ protocols in addition to the IAQ audit report.