Gas Heat ESCO Practice Exam 2025 - Free Gas Heat ESCO Practice Questions and Study Guide

The typical gas pressure required at the manifold and burners of a natural gas furnace is 3.5 inches of water column (WC). This pressure is crucial for ensuring optimal combustion and efficiency in gas-operated heating systems. At this level, the gas can adequately flow to the burners, allowing for the necessary air-gas mixture to ignite and produce heat effectively.

Setting the gas pressure correctly is vital for the safe and efficient operation of the furnace. If the pressure is too low, it may lead to incomplete combustion, resulting in poor heating performance and potentially harmful byproducts such as carbon monoxide. Conversely, if the pressure is too high, it can lead to excessive flame, increased wear on equipment, and unsafe operating conditions. Therefore, adhering to the standard of 3.5 inches WC helps maintain balance between performance, efficiency, and safety in the operation of natural gas furnaces.