What is the maximum input capacity for gas appliances operating above 2,000 feet?

The maximum input capacity for gas appliances operating above 2,000 feet is established to ensure that appliances function efficiently and safely at higher altitudes where atmospheric pressure is lower. As altitude increases, the density of air decreases, which can affect the combustion process. Therefore, manufacturers provide guidelines that adjust the input capacity to maintain the proper air-to-gas ratio for optimal performance.

In this context, the correct value of 96% indicates the maximum input capacity is allowed to be reduced to ensure efficient combustion and to prevent issues such as incomplete burning of gas. When appliances are installed at elevations above 2,000 feet, they typically require adjustments to maintain a proper flame and prevent excessive production of carbon monoxide or other combustion by-products.

The other percentages provided (98%, 94%, and 92%) do not accurately reflect the established safety and performance standards required for gas appliances in such environments, highlighting the careful calibration needed for appliances operating at higher elevations.