Which factor is NOT a consideration when assessing ventilation for gas-fired appliances?

When assessing ventilation for gas-fired appliances, it is crucial to focus on several key factors that directly impact safety, efficiency, and functionality. The color of wall paint does not influence the mechanical or technical aspects of ventilation systems. Ventilation needs to ensure adequate air supply for combustion and proper exhaust for harmful gases, which makes other factors more critical.

Space availability is vital, as it determines how the appliances can be installed and ensures that there is enough room for adequate airflow. The appliance fuel type is also essential since different fuels have different combustion characteristics and ventilation requirements. The age of the building can factor into considerations like the existing structure and compliance with current ventilation standards. These factors work together to ensure that gas-fired appliances operate safely and effectively, while wall paint color remains irrelevant in this context.