According to ACCA manual N5, what is the summer design condition in Greensboro, NC?

• A. 88 db / 72 wb
• B. 90 db / 74 wb
• C. 92 db / 76 wb
• D. 94 db / 78 wb

Answer: (B)

The summer design condition for Greensboro, NC, as specified in the ACCA Manual N5, is based on the expected outdoor temperature and humidity levels during the peak summer months. The correct values of 90 degrees dry bulb (db) and 74 degrees wet bulb (wb) reflect the typical conditions during these peak heat periods.

The dry bulb temperature represents the actual air temperature, while the wet bulb temperature indicates moisture in the air and is crucial for understanding the heat index and comfort levels. These conditions are vital for heating, ventilation, and air conditioning (HVAC) professionals to properly size and design systems that will efficiently cool spaces during the summer months.

Understanding these conditions also helps in the assessment of equipment performance under localized climate variations, ensuring energy efficiency and occupant comfort.