Despite the many advantages of heat exchangers, including saved time and energy, increased performance and lower maintenance costs, there are some drawbacks to take note of. The materials used to manufacture heat exchangers need to be high quality and durable as the process can cause high levels of stress and pressure. One of the biggest problems with heat exchangers is corrosion. Due to the constant flowing of liquid and high humidity rates in the process of heat transfer, corrosion is common and unfortunately is very difficult to avoid. To help prevent this from creating system running problems, heat exchanger manufacturers need to use tubing and walling that is resistant to general corrosion, pitting, stress-corrosion cracking and selective leaching. Also, some liquids can build up residue over extended periods of time which then needs to be cleaned, but this is generally a straightforward process and should not cause too long of a process delay. Although they are not always known as heat exchangers, these devices are quite common and are an important element in many machines. Heat exchangers aren’t always industrial process types; most mechanical, chemical and energy systems require heat transferal of some sort. For instance, a car’s radiator is a type of heat exchanger responsible for transferring heat from the engine to the air. Other examples of commercial uses for heat exchangers include spa and swimming pool heating, home radiators, hot water radiators and air conditioners. Whether in commercial or industrial use, heat exchangers are vital in creating greater efficiency in terms of both energy and costs.