FOREWORD The committee approved a proposal to change references to ??whole-building?? or ??whole-house?? ventilation to ??dwellingunit?? ventilation in the main body of the standard. This addendum will ensure that the same nomenclature is used in Normative Appendix A@ ??Existing Buildings@?? for consistency. Note: In this addendum@ changes to the current standard are indicated in the text by underlining (for additions) and (for deletions) unless the instructions specifically mention some other means of indicating the changes.