Preconditioning of the air is an important step in achieving a strong overall air quality, which is particularly essential in areas of the world where the climate tends to be especially humid. Preconditioning units are designed with specifications to extract the moisture from the air before it enters a building's interior so that it does not engender issues in secondary parts of the system, nor occupants' health. According to Desert Aire, the specification goal is 55 degrees Fahrenheit dewpoint.
Many PC Air Handlers are designed to be extra efficient in operation. Some, such as the one created by FCX for aircraft, are designed to maximize efficiency and increase their green status through the use of Variable Frequency Drives (VFD) to control motor speeds and modulating valves to use only what is needed to cool and heat the aircraft. Lower energy consumption could have positive impacts not only on the environment, but also on the airline's bottom line and ticket prices as well.
The ASHRAE is an American professional organization that creates standards for air quality within buildings as well as standards and specifications for heating, cooling and other air conditioning systems, such as PC Air Handling units. All machines must be designed of material to suit their intended purpose without catastrophic failure, and their resulting air production must meet certain standards for air filtration, moisture and temperature.
