Maintaining these conditions in an indoor setting presents challenges. In 1997, the facilities team members at Chicago's John G. Shedd Aquarium decided they needed to upgrade the systems in the penguin exhibit area. The air-handling system it had at the time could hold the temperature to only ±10º F of the setpoint, which was too much of a variation for the penguins.
That changed later in the year when Shedd began installing new A/C units controlled by an Infinity system from Andover Controls. The target was to stabilize the environment by holding the temperature to within 5º of the setpoint. The Infinity system beat that goal - the penguins now enjoy temperatures within one-half of a degree of the setpoint. The result: they eat better, are healthier than ever, are back to their natural colors, and breed more.