Greener Product LLC Certification Seal demonstrates that a product has been evaluated against the LEED, LEED for Homes and NAHB green building standards using internationally recognized third-party certification organizations, laboratory test results and/or other supporting documentation. The Seal confirms the product complies with the LEED, LEED for Homes and NAHB standards and may earn credits that contribute to certification under green building rating systems, such as LEED®, LEED for Homes and NAHB.