Primarily used to cool industrial equipment such as communication shelters, relocatable offices, electrical switchgear stations, control rooms, and pump stations, Marvair air conditioners have been engineered for use in both mobile and fixed building applications and are ruggedly engineered for use in a wide range of designs and applications.  Every Marvair ComPac unit is designed for operation up to 120ºF with low ambient control standard on every unit to 20ºF. If additional extremes are necessary, units may be configured with our "Desert Duty" option pushing operation up to 131º or an "Extreme Duty" package that will allow units to cool all the way down to -40ºF.