AHU often includes several components Filters are in place to keep gunk out of the system, control particulates or remove contaminants Heating coils in the AHU are controlled by a thermostat Hot water or steam produced by the boiler allows selected temperature to be achieved in air passing through the heating coil A humidifier in the AHU blows in steam to add moiture to the air A cooling coil/dehumidifier cools the air and takes moisture out as the air passes through
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