An attic with an area of 600 square feet should have what total vent area in square feet?

In order to determine the appropriate total vent area for an attic, it's important to understand the general rule of thumb used within the home inspection field, which is approximately one square foot of vent space for every 150 square feet of attic area. In this scenario, the attic is 600 square feet in size.

To calculate the required vent area, you would divide the attic area by 150. Thus, 600 square feet divided by 150 equals 4 square feet of necessary vent area. This number ensures that there is adequate ventilation within the attic space, allowing for proper air circulation and helping to prevent moisture buildup and related issues such as mold and wood rot.

Given this context, the correct vent area for an attic of 600 square feet is 4 square feet. Therefore, the answer reflecting the accurate calculation and understanding of the needs for attic ventilation is 4 square feet.