FOREWORD This addendum adds an appendix to allow some optional pathways that will only be applicable for previously occupied buildings. The major focus is to overcome the barriers that exist to application of the standard in existing buildings. Specifically@ many requirements that are easy to meet at the original design and construction stage may be very difficult or extremely expensive at the retrofit stage@ such as the selection and installation of conforming equipment. To that end@ this appendix offers some options that allow a bit more flexibility in this building population. The biggest conceptual change is to provide alternative methods for meeting the local exhaust requirement in kitchens or baths that do not have what is currently required by Standard 62.2. As stated in Section C1@ compliance with the remainder of the standard is still required when using Appendix C.