What should be the rating capacity of blowers in a flue gas system?

The rating capacity of blowers in a flue gas system is designed to ensure that the system can adequately handle the maximum expected flow of gases while maintaining efficient operation. A rating of 125% is typically required because it provides a safety margin that takes into account variations in operating conditions, such as temperature changes, pressure fluctuations, and potential blockages in the system.

This extra capacity helps ensure that the system can function effectively even when these variable factors come into play, thus preventing operational issues such as insufficient airflow, which could lead to poor combustion efficiency or flue gas issues. It also accommodates for future needs or potential increases in output without requiring immediate upgrades to the blower system.

In contrast, ratings of 100%, 150%, or 80% do not provide the same balanced approach needed in a flue gas system. A 100% rating would offer no margin for error and could risk insufficient airflow during peak demand. While 150% may seem robust, it could indicate unnecessary overcapacity, leading to increased energy consumption and costs. An 80% rating would be inadequate, especially in scenarios where the system encounters higher than expected operational demands. Therefore, a blower rating of 125% strikes an ideal balance by allowing for effective performance while