Bergstrom has introduced Cool Zone, a new air-conditioning system for buses. Recent testing on a Blue Bird bus to Florida and Texas school bus specs found that Cool Zone cooled the bus five minutes faster than required by the state specs, according to Bergstrom.

The Cool Zone system consists of front and rear bulkhead units, a midship unit, a dash unit, two three-fan condensers, and two compressors. Features include adjustable mounting brackets and filters that are easy to service, according to Bergstrom; electronic freeze protection on the rear bulkhead to prevent coils from freezing and a fully insulated case to prevent case sweating; and a two-ton thermal expansion valve on the front bulkhead to improve a/c performance while the adjustable louvers direct airflow and enhance cooling.

The Cool Zone system is customizable and can consist of any combination of bus systems.