What is NOT a function of subfloor ventilation?

Subfloor ventilation plays a critical role in maintaining a healthy environment within a structure's crawl space. Its primary functions include removing moisture from the air, preventing mold growth by controlling the moisture levels, and reducing humidity levels in order to create an unsuitable environment for pests and other problems.

When considering the answer that indicates what is not a function of subfloor ventilation, the provision of access for pest control stands out. While access for pest control is important and may occur through ventilation sites, the actual function of subfloor ventilation itself does not inherently include creating access points for pest management professionals. Instead, its purpose is focused on air circulation, moisture management, and maintaining overall indoor air quality. Thus, the correct choice highlights that providing access for pest control is secondary to the ventilation's primary goal of maintaining a healthy subfloor environment.