| | TD Return Plenum - Manufactured Non-Standard 2023 | | | |
| | TD Return Plenum - Manufactured Non-Standard 2024 | | | |
| | TD Supply Plenum - Manufactured Non-Standard 2023 | | | |
| | TD Supply Plenum - Manufactured Non-Standard 2024 | | | |
| | Galv Plenums - Manufactured Non-Standard (from 2017) | | | |