At what elevation should the input for gas appliances typically be reduced?

The input for gas appliances typically should be reduced because of the decrease in atmospheric pressure at higher elevations. As altitude increases, the density of air decreases, which can affect the combustion process of gas appliances that are calibrated for sea level conditions.

Reducing the input at an elevation above 2,000 feet helps ensure that gas appliances operate efficiently and safely by adjusting the fuel-to-air ratio for optimal combustion. This adjustment is crucial to prevent incomplete combustion, which could lead to safety hazards, such as the production of carbon monoxide or poor appliance performance. By adhering to this guideline, it ensures that appliances continue to function properly and that consumers remain safe while using gas appliances in higher altitudes.