What will NOT help in maintaining a proper venting system?

D is the correct choice because ignoring local building codes directly undermines the safety and efficiency of a venting system. Local building codes are established to ensure that ventilation systems operate safely, effectively, and in compliance with regulations designed to protect life and property. These codes might dictate the type of materials used, the installation procedures, and the distances from combustible materials, among other factors.

Regular maintenance checks contribute positively to the function of a venting system by ensuring that it is free of obstructions and in good working order. Using appropriate vent sizes helps to ensure proper airflow, reducing the risk of backdrafts or insufficient ventilation. Minimizing the number of elbows in the venting system aids in maintaining unobstructed airflow, as each bend can create resistance and hinder effective exhaust. In contrast, ignoring these essential guidelines can lead to problems such as hazardous gas buildup, decreased system efficiency, and potential code violations, which can result in fines or unsafe conditions.