Usha Crisp Air 5 Blade (250mm) Exhaust Fan (Pack of 4) Price starts at Rs. 7,599. The lowest price of Usha Crisp Air 5 Blade (250mm) Exhaust Fan (Pack of 4) is at Flipkart. Usha Crisp Air 5 Blade (250mm) Exhaust Fan (Pack of 4) is not available in other online stores. Usha Crisp Air 5 Blade (250mm) Exhaust Fan (Pack of 4) is available in White colours across various online stores in India.