Yes. If an individual obtains additional CEDIA Certifications, their previous CEDIA Certifications remain valid. The CEDIA Certified Professional must maintain 30 CEUs within three years following the date of their most recent certification. CEUs earned will only count toward the most recent certification.
If an individual becomes certified at a higher level, previously earned CEUs will not count toward maintaining that higher-level certification. In other words, the clock starts over when you achieve a new level of certification.