Attic Insulation Question
I know, I know, not exactly a woodworking question...
Background: My attic is framed with run of the mill 2x4 trusses. There is an air handler in the attic. To support the air handler, there are 2x4's laid on edge and fastened to the top of the lower chord of the truss. On top of those 2x4's is a piece of plywood. There's a pan on top of the plywood and then the air handler.
I'm repairing the ceiling in the room below. When I took down the old ceiling, of course all the insulation fell down. I know I should replace the blown in insulation in the rest of the area, but I'm wondering if there should be insulation in the space between underside of the platform the air handler sits on and the ceiling below, or if air circulation should be allowed. A drawing below describes the scene of the crime. Thanks.