Electrochromic glass property.
(B) Electrochromic glass property. To be eligible for the section 48 credit, electrochromic windows must be rated in accordance with the National Fenestration Rating Council (NFRC) and secondary glazing systems must be rated in accordance with the Attachments Energy Rating Council (AERC) Rating and Certification Process, or subsequent revisions. See paragraph (e)(2)(ii) of this section for the definition of electrochromic glass property.