Close up of evacuated tubes on a rooftop. Evacuated tubes are used to heat water using sunlight.
Palabras clave
building,
energy,
efficient,
conservation,
boiling water,
architecture,
glasses,
office,
business,
steel,
sky,
facades,
skyscraper,
city,
window,
pattern,
wall,
urban,
design,
structure,
texture,
roof,
tower,
perspective,
exterior,
tall,
detail,
tile,
white,
technology,
sunlight,
tube