At 16, Jhansi student Kalyani Srivastava built a low cost "Desi AC" for ₹1,800 using a thermocol icebox, a 12 volt fan and solar power. Reports claim it lowers room temperature by 4 to 5°C in an hour, offering affordable relief for heat prone Bundelkhand homes; the prototype gained recognition but is not a substitute for conventional air conditioning.
