Ключевые слова: abstract, aged, air, architecture, background, cleaning, close, closeup, conditioner, conditioning, construction, cooling, design, detail, dirty, duct, dust, exhaust, exterior, filter, frame, grid, grille, grunge, home, industrial, iron, maintenance, material, metal, old, panel, pattern, rough, rust, rusteaten, steel, structure, surface, system, systems, technology, temperature, texture, textured, up, vent, ventilate, ventilated, ventilating, ventilation, ventilation system, ventilator, vintage, wall, weathered, white,