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Sea-level input ratings shall be used when determining maximum capacity for high-altitude installation. Actual input, derated for altitude, shall be used for determining minimum capacity for high-altitude installation.

Related Code Sections

301.12 General Regulations, Fuel Types
Fuel-fired appliances shall be designed for use with the type of fuel to which they will be connected and the altitude at which they are installed ...
301.12 General Regulations, Fuel Types
Fuel-fired appliances shall be designed for use with the type of fuel to which they will be connected and the altitude at which they are installed ...