Our 23-story building is about to start partial occupancy at floor 12th.

The building's AHU will be controlled by a variable speed drive which will regulate automatically the air supply quantity that the building needs, through the manual opening or closure of the supply and return dampers at each floor.

The project team will designate a person responsible of maintaining the dampers closed, except at the occupied floors, so the HVAC system only functions at these floors.

Is this enough for complying with this credit? or are we required to install MERV 8 filters at each return air grille, even though they are not being used?

What if we document that the supply and return air ducts are sealed at all non-occupied floors? then can we skip the MERV 8 filters and use our normal MERV 13 filters at occupied floors? Or both sections (the occupied and the under-construction sections) need to have their MERV 8 filters and we have to replace all of them when all construction activities end?

In all cases, what will we need to document the compliance whit this credit?

Note: the construction team is already following SMACNA guidelines, and weekly photographs are being reported.

Thank you!