What is the typical manifold pressure for natural gas?

The typical manifold pressure for natural gas systems is 3.5 inches of water column (wc). This pressure is standard for most residential and light commercial gas appliances, ensuring efficient operation and safe delivery of gas to the burners.

Operating at this pressure helps maintain a proper air-fuel mixture, which is crucial for optimal combustion and efficiency while preventing issues such as incomplete combustion or excessive emissions. If the manifold pressure is set too high, it can lead to a risk of overheating or creating an unsafe operating condition, while too low a pressure might result in insufficient heat output and poor appliance performance.

Understanding the standard manifold pressure is essential for HVAC technicians to ensure systems are correctly calibrated and functioning as intended, enhancing safety and efficiency in gas appliances.