Indoor Equipment is in a second floor conditioned mechanical room.All zone dampers(5) are located in the room.
Mostly Metal duct in the mech. room,to support dampers and air purifiers.
.35 ESP at 1750 cfms with all zones calling.
Our service techs say,this where all indoor equipment should be located!!
ERV also serves as ducted exhaust for bathrooms.UVC lights in the coil.
Oh,and extensive use of turning vanes in 90° elbows.