Painting Roofs White Cut AC Use in a Philadelphia Pilot of 340 Homes

A reflective white roof coating cut air-conditioning demand by about 560 kWh per home per year in a Philadelphia pilot that covered 340 modest houses. Run by the Energy Coordinating Agency between 2001 and 2003, the program also lowered indoor temperatures by roughly 4 to 5°F, pointing to a low-cost way to blunt heat risk […]