Sunrise Solar Pvt. Ltd. Offers Heat Exchangers for Efficient Heat Transfer Between Two Mediums. Sunrise Solar Pvt. Ltd. Is an ISO 9001:2000 and ISO 14001 certified company. The Heat Exchangers for Efficient Heat Transfer Between Two Mediums are widely used in Space Heating, Refrigeration, Air Conditioning, Power Plants etc. It is also used for Chemical Plants, Petrochemical Plants, Petroleum Refineries, and Natural Gas Processing. Common example of a heat exchanger is the Radiator in a car, in which a hot engine-cooling fluid, like coolant, transfers heat to air flowing through the radiator.