- The Pennsylvania Energy Development Authority provided the PHA (Philadelphia Housing Authority) with grant funding to assist with the costs of ensuring that the HOPE VI Ludlow development, which features 160 units, will reach Energy Star standards. The PHA also worked with a non-profit organization, the Energy Coordinating Agency, to ensure Energy Star certification. In addition, another development, Nellie Reynolds Gardens, incorporated a 20,000 square foot green roof. The roof should result in 10-20% savings related to energy costs. It is designed to ensure minimal maintenance. The property also had environmentally friendly pains, carpeting, and caulking.