Models 7770, 7670 and 7570 have a two-stage cooling system designed to conserve compressed air. During regular usage, the coolers utilize only the first cooling stage. When there is increased demand for cooling — whether due to high heat load in the enclosure, high ambient manufacturing facility temperatures or hot weather conditions — the second cooling stage is activated. The large enclosure coolers have a cooling capacity of 5,000 BTU/hr. Model 7570 also is designed for hazardous locations and UL classified for use in most Class I, Division 2, Class II, Division 2 and Class III areas.

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