What is the specification for a modular boiler regarding its input rating?

The correct answer identifies the specifications for a modular boiler's input rating, which is established to ensure efficient operation and compliance with safety and performance standards. The rating typically defines the maximum capacity and efficiency for various fuel types, including gas, oil, and electricity.

In this instance, the specifications align with the established guidelines for modular boilers, which often cover the ranges indicated. Specifically, the noted inputs suggest an optimized level that allows the boiler to function effectively while meeting regulatory standards. The distinction in ratings for gas, oil, and electric reflects the varying characteristics and efficiencies of different fuel types.

This specific input rate—400,000 Btu/h for gas, 3 gallons per hour for oil, and 115 kW for electric—serves as a benchmark within the modular boiler category. It ensures that the systems can adequately meet heating demands without operating inefficiently or exceeding safety thresholds. These ratings establish a foundation for understanding energy consumption and performance in practical applications.

Realizing the necessity of these ratings helps both users and installers understand what is required for operational efficiency and compliance with the North Carolina Mechanical Code, ensuring that all installations and applications of modular boilers align with regulatory practices.