Ventilation pipes on flat roof of school building

---

Metal pipes for ventilation system on flat roof of school

---

Size: 5472px × 3648px
Location:
Photo credit: © Zoonar/Ben Schonewille / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: air, air-tight, building, carriers, change, circulation, construction, dome, domes, drainage, duct, felt, flat, fresh, mechanical, metal, pipes, piping, roof, roofing, school, skylights, support, ventilation, waterproof