Companies such as Voltas, Haier, Godrej Appliances and Lloyd said sales of cooling appliances grew up to 15% in March as compared to 2019, surpassing industry expectations and necessitating an increase in production. “There has been a spurt in demand in the last ten days after two washed out summers. We are ramping up our production due to the sudden surge,” said Voltas managing director Pradeep Bakshi.