Health Product Declaration HPDs Promote Openness in Sustainable Construction We open doors to events, museums, airports, hotels, homes… in fact, we open doors to life. As the global leader in door opening solutions we are dedicated to satisfying end-user needs for security, safety and convenience. Thanks to the Health Product Declaration (HPD) initiative, we're opening the doors to product transparency as well. ASSA ABLOY is proud to share its first HPD documents for wood doors. 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.