The Materials Life-cycle disclosure and assesment credit, Option 1 and Option 3, includes a pretty specific list of mateirals that MAY be included:
"Furniture as well as piping, pipe insulation, ducts, duct insulation, conduit, plumbing fixtures, faucets, shower heads, and lamp housing may be included if they are included consistently within cost based Materials and Resources credits"
But it isn't clear about what, if any, products or materials should NOT be included, both in the denominator and, if they contribute, in the numerator. As written, it would seem to imply that all other products are to be included, but LEED tradition and common sense argues that expensive mechanical and electrical equipment (chillers, automation systems, controls, elevators, meters) should NOT be included. We'll need a much clearer definition of that for this to work, I think.
