A gas appliance is to be installed in a manufactured home. The rating for gas appliances are based on sea level atmospheric pressure. What shall be the reduced rating for the gas appliance for every 1,000` above sea level?

A gas appliance is to be installed in a manufactured home. The rating for gas appliances are based on sea level atmospheric pressure. What shall be the reduced rating for the gas appliance for every 1,000` above sea level?