Smallest Air cooler
The record of making the smallest air cooler was set by Tirumalaneedi Sai (born on July 7, 2004) of East Godavari, Andhra Pradesh. He created an air cooler (measuring 30 mm x12.4 mm x 17 mm), which works on a 1.8 volts battery using motor, wire and vaseline jelly jar at the age of 17 years, 7 months and 29 days, as confirmed on March 5, 2022.