Close up of evacuated tubes on a rooftop. Evacuated tubes are used to heat water using sunlight.

---

Size: 5078px × 3565px
Location: Klerksdorp, South Africa
Photo credit: © Willem Cronje / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: architecture, boiling, building, business, city, conservation, construction, design, detail, efficient, energy, evacuated, exterior, facade, glass, heating, light, office, pattern, perspective, roof, sky, skyscraper, solar, steel, structure, sun, sunlight, surface, sustainable, tall, texture, tile, tower, tube, tubes, urban, wall, water, white, window