Ключевые слова: air, air conditioner, background, beautiful, blue, building, conditioning, construction, cool, cooling, design, effect, fan, flow, fresh, good, heating, home, hot, house, industrial, industry, light, metal, natural roof ventilator, nature, outdoor, power, roof, roof ventilator, rooftop, silver, space, spinning, steel, summer, sun, sunlight, system, technology, temperature, top, turbine, vent, ventilator, white, wind,