Usha Crisp Air 150 mm 5 Blade Exhaust Fan (Pack of 4) Price starts at Rs. 4,929. The lowest price of Usha Crisp Air 150 mm 5 Blade Exhaust Fan (Pack of 4) is at Flipkart. Usha Crisp Air 150 mm 5 Blade Exhaust Fan (Pack of 4) is not available in other online stores. Usha Crisp Air 150 mm 5 Blade Exhaust Fan (Pack of 4) is available in Black colours across various online stores in India.