What is the recommended range for the manifold pressure in natural gas appliances?

The recommended range for the manifold pressure in natural gas appliances is typically between 3.5 to 10 inches of water column (WC). This pressure is essential for ensuring that the gas burns properly, providing efficient combustion and heating. Operating within this range maximizes the appliance's performance and safety by ensuring that the correct amount of gas is supplied to the burners, which helps in achieving optimal heat output.

In natural gas appliances, manifold pressure can significantly affect the appliance's ability to function correctly. If the pressure is too low, the burners may not receive enough gas, leading to incomplete combustion, inefficient heating, and potentially dangerous situations like the accumulation of unburned gas. Conversely, if the pressure is too high, it can cause excessive flame heights, increased emissions, and even damage to the appliance over time.

Overall, the range of 3.5 to 10 inches of WC is established as a balanced parameter to ensure effective and safe operation in natural gas appliances, aligning with manufacturers’ specifications and safety standards.