Health Product Declarations Health Product Declarations (HPDs) promote openness in sustainable construction by listing the material ingredients for each building product. Green building guidelines and standards are continuously evolving to make buildings more efficient, productive and healthier for the occupants within. This latter sustainability goal--healthier buildings--requires greater scrutiny of the elements that go into a building. As a result, a need has developed for Health Product Declarations (HPDs) that lists the material ingredients for each building product. Environmental Product Declarations: Go to our EPD page Use the search tool below to find Health Product Declarations.