New Delhi, June 14 -- Air conditioner sales in India grew 20% in both April and May from the year earlier as a prolonged winter followed by a surge in summer temperatures is fuelling a market recovery after two straight years of tepid sales. Sales were especially strong in parts of south and east India, according to air conditioner makers. If the sales momentum continues, 2019 could turn out to be one of the best years for cooling products after 2016, which saw harsh summers. Large parts of India are in the grip of a heatwave. Temperatures began rising in April and soared in May with Churu in Rajasthan crossing the 50degree Celsius-mark earlier this week. In Punjab, Haryana, and Delhi-NCR, a red alert has been issued advising residents to s...