Previous versions of LEED stipulated the Material and Resource Credits only applied to Divisions 2-10 products.
Under LEEDv4, do CSI Divisions 21 – Fire Suppression, 22 – Plumbing, 23 – Heating Ventilating and Air Conditioning, 25 Integrated Automation, 26 – Electrical, 27 – Communications, 28 – Electronic Safety and Security know require documentation for the Material and Resource credits including Building product disclosure and optimization credits MRc2, MRc3 and MRc4?
of piping, pipe insulation, ducts, duct insulation, conduit, plumbing fixtures, faucets, showerheads, and lamp housings. If optional products or materials are included in cost-based credit calculations, such as Option 2 under each Building Product Disclosure and Optimization credits, they must be included consistently across all cost-based credit calculations. Additionally, if optional products and materials are included in product based calculations, such as Option 1 under each Building Product Disclosure and Optimization credits, they are not required to be included in cost-based credit calculations. However, unlike furniture, if some of these products are included in credit calculations, not all products of that type must be included."