The heat transfer process is commonly used in a variety of appliances. Heat transfer takes place regularly in your refrigerator, your air conditioner, and your deep freezer. Heat transfer products are also used in a variety of other machines, like your car. Heat transfer is an integral process to keep your car running smoothly. There are plenty of heat transfer products that you can buy in the local markets. Some of the most commonly used products include air coolers, condensers, and radiators. Here are some tips for buying conventional heat transfer units throughout the state of Indiana.