Thank you guys so much for sharing all of this information! I ordered my parts yesterday through the Carlsbad service center. They changed one of my parts though. I requested 1499137-99-C (DUCT, Air Intake), which is the correct part number per the EPC, and they replaced with 1499137-50-B. I searched the EPC Parts Catalog and that doesn't exist. But the part description is a win as it states "HEPA, DUCT" as opposed to "AIR INTAKE" like the 00-C part. Will let you guys know what I receive!