Should you be concerned about a 55F chilled water supply used for human comfort, and why?

Prepare for the New York City Refrigeration License Exam I. Utilize flashcards, multiple-choice questions, and detailed explanations to boost your readiness. Ace your licensing exam!

Multiple Choice

Should you be concerned about a 55F chilled water supply used for human comfort, and why?

When people feel comfortable in a cooled space, it isn’t just about the air temperature; moisture removal matters too. The chilled-water temperature in the cooling coil determines how much latent cooling (dehumidification) you can achieve. A supply temperature of 55 F is relatively warm for comfort cooling, which means the coil can remove less moisture from the air. As a result, humidity stays higher and the air feels muggy, even if the space is cooled to the desired temperature. In practice, engineers design with chilled-water temperatures around the 40s to mid-40s Fahrenheit to provide good dehumidification and comfortable humidity levels. So 55 F is typically not sufficient for reliable comfort, which is why this supply temperature is concerning for human comfort.

When people feel comfortable in a cooled space, it isn’t just about the air temperature; moisture removal matters too. The chilled-water temperature in the cooling coil determines how much latent cooling (dehumidification) you can achieve. A supply temperature of 55 F is relatively warm for comfort cooling, which means the coil can remove less moisture from the air. As a result, humidity stays higher and the air feels muggy, even if the space is cooled to the desired temperature.

In practice, engineers design with chilled-water temperatures around the 40s to mid-40s Fahrenheit to provide good dehumidification and comfortable humidity levels. So 55 F is typically not sufficient for reliable comfort, which is why this supply temperature is concerning for human comfort.

More practice questions