KRN HEAT EXCHANGER AND REFRIGERATION LIMITED-HVAC and Refrigeration Innovators KRN makes fin and tube-type heat exchangers at its Neemrana, Rajasthan facility. They supply important parts like evaporator coils, condenser coils, and sheet metal for HVAC and refrigeration systems used in homes, businesses, and industries. What is a fin and tube heat exchanger? These devices have ...