A residential home in Texas has an attic space that is not properly ventilated. The International Residential Code (IRC) requires a minimum ventilation area of 1 square foot per 300 square feet of attic area. What is the minimum ventilation area required for an attic space that measures 1,200 square feet?

Exam tip

Ensure that you are aware of the specific ventilation requirements for different types of spaces within a building.

Why C is correct

The minimum ventilation area required is calculated by multiplying the attic area by the required ventilation area per 300 square feet. Therefore, 1,200 sq ft / 300 sq ft = 4 sq ft. The correct answer is 12 square feet, as the calculation is based on the attic area, not the total square footage of the house.