AHU system Protocol and report preparation by me or by party(Installation person).
AHU system protocol is not necessary who can prepare it. But if provide by vendor you accept it.
But it depends on which type of document provide by vendor. If Vendor provide Qualification document and validation document then only you need to environment monitoring for AHU system.
Most of vendor provide the documentation but it depend on your vendor.
AHU system URS, DQ, IQ, OQ, and PQ need for audit otherwise less documents required. Please suggest me.