Condensation on a cooling coil generally is considered the most energy-efficient method of dehumidifying air, as long as performance requirements fall within the practical range of refrigeration. For HVAC systems designed for conditioned-space temperatures of 65°F or higher, the lower end of this range is 32°F dew-point humidity—in theory; in practice, it is more like 40°F to 45°F dew-point humidity. Allowing for space-envelope, occupant, and process moisture load, the ...

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