The new glass has a spectrally tuneable low-emissivity coating that uses a phase change material to control the amount of heat that comes into the room from the window, without affecting the quality of the light.The thermal energy from the sun's infr
The glazing can switch its arrangement of atoms to either reflect or absorb light from the sun depending on the seasons, according to researchers at the University of Pittsburgh.
New research takes energy efficient windows a step further by proposing a new "smart window" design that would harvest the sun s energy in the winter to warm the house and reflect it in the summer to keep it cool.