A room humidistat initiates the lowering of the humidity of the conditioned supply air to a space, while the actual process is accomplished by what means?
• Dehumidification process in HVAC systems: how cooling coils and reheaters work together to control both temperature and moisture • Relationship between cooling coil temperature and condensation of moisture from the air • Purpose of a reheater after moisture has been removed
• When you want to reduce humidity in a space, do you want the air passing over the cooling coil to be colder or warmer to remove more moisture? Why? • After the air has been dehumidified and is now quite cool, what does adjusting the reheater temperature accomplish in terms of comfort in the conditioned space? • Which combination of coil and reheater temperature changes would increase moisture removal while still delivering air at a comfortable final temperature?
• Make sure you understand that more moisture condenses when air is cooled below its dew point on the cooling coil • Check which option would increase latent cooling (moisture removal) without making the room too cold overall • Verify which answer choice reflects strong dehumidification at the coil followed by temperature adjustment for comfort at the reheater
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