Today‰fs buildings use the sun for heat, light and power
The ‰gImpact 2000‰h house Boston, Massachusetts, USA
Floor area 269 m2 (2900 ft2)
Passively solar heated, including a skylit ‰gsunspace‰h (bright blue roof section at center); total passive window area 34 m2 (365 ft2)
DHW (domestic hot water) collectors are just above the skylight, 12 m2 (125 ft2)
The remainder of the roof is covered by building-integrated PV (photovoltaic) panels, 54 m2 (576 ft2) that provide 4 kWpeak