Section 041-13-1 - Exceptions to this ChapterA. Hot water heating boilers and hot water supply boilers are exempt from the certificate inspection process provided the following conditions are met: (1) The boilers are constructed and installed in accordance with the Board rules and pass an initial installation inspection;(2) The heat input to any one object is less than 200,000 Btu/hour; and(3) The aggregate heat input of the plant is less than 300,000 Btu/hour.B. Water heaters are exempt from the provisions of this Chapter provided the following conditions are met. (1) The water heater is built and installed to a nationally recognized code;(2) The heat input is less than 200,000 Btu/hour;(3) A properly sized ASME/NB rated pressure relief device is installed and functional;(4) The object has proper controls to ensure water temperature does not exceed 210 degrees Fahrenheit;(5) The water capacity is less than 120 gallons; and(6) The aggregate heat input of the plant is less than 300,000 Btu/hour.02-041 C.M.R. ch. 13, § 1