What factor is critical in determining whether LEED credit can be earned when using Environmental Product Declarations (EPD)?

The critical factor in determining whether LEED credit can be earned when using Environmental Product Declarations (EPD) is the number of different permanently installed products from various manufacturers. LEED emphasizes the importance of sourcing products that demonstrate sustainability through EPDs, which provide transparent information on the environmental impact of a product throughout its life cycle.

To earn credit, the project must utilize a diverse range of products with EPDs, showcasing a commitment to sustainability across multiple categories instead of relying on a single product or manufacturer's offerings. This approach encourages a broader market participation and promotes the use of materials that are environmentally preferable, aligning with the overall goals of LEED to improve buildings' environmental quality.

Other factors like cost, the location of manufacturers, and the size of the products are not critical in the context of earning credits through EPDs. While product cost can influence purchasing decisions, it does not directly impact the credit eligibility. Similarly, the geographical location of manufacturers and the physical size of the products are not determining criteria for LEED credits based on EPD use.