For this evaluation, Customer was stating that there was a noise coming from The ceiling, At first I thought it was Something in the duct, Ran my inspection Camera and didn't find anything I also climbed into the attic And didn't find anything I then noticed that the boiler is next to the ac Went back into the attic, Check that there was a vent stack in the roof, perforating through. It is located next to supply plenum in attic Plumber will need to seal it. ****Referred plumber, need to schedule for this Thursday 6/26 @6 PM****