What is the maximum penetration allowed from screws into an electric dryer duct?

The maximum penetration allowed from screws into an electric dryer duct is 1/8 inch. This limitation is significant because it helps to ensure that the screws do not intrude too deeply into the ductwork, which could obstruct airflow or create points where lint can accumulate. Over time, accumulated lint can present a fire hazard, so maintaining smooth and unobstructed duct surfaces is essential for safe operation.

In the context of dryer ducts, it’s crucial to prevent any potential blockages that may hinder the dryer’s performance or increase fire risks. Therefore, the specified maximum penetration of 1/8 inch ensures that the structural integrity of the duct is preserved while minimizing any risk factors associated with dryer lint accumulation. This standard is part of the best practices in venting and managing dryer ducts in compliance with safety codes.