Variable volume air conditioning systems utilise some of the latest technology available to control zone temperatures and save fan energy. In fact, the energy savings can be quite substantial. Then why do engineers and building managers have reservations about using this type of system? Probably the memory of past experiences. The chain of design, equipment selection, installation, and air balancing must be tailored to a building's needs or conflicts will arise. There are many disciplines to consider when creating a VAV system, and if one link is weak, there can be trouble. Are more complicated systems the price we have to pay for saving energy?

Units: Dual

KEYWORDS: year 1997, Variable volume air conditioning, selecting, optimising, pneumatic controls, computer controls