Definitions

As used in this part 15, unless the context otherwise requires: (1) "BTU" means British thermal unit, which is a scientific unit of measurement equal to the quantity of heat required to raise the temperature of one pound of water one degree Fahrenheit at approximately sixty degrees Fahrenheit. (2) "Energy Star program" has the meaning set forth in section 6-7.5-102 (24). (3) "Executive director" means the executive director of the department of public health and environment or the executive director's designee. (4) "Fan-type central furnace" means a self-contained space heater that provides for circulation of heated air at pressures other than atmospheric through ducts more than ten inches in length. (5) (a) "Heat input" means the heat released by the combustion of fuels and is based on the gross energy content of the combustible fuel, also known as the higher heating value of fuel. (b) "Heat input" does not include the enthalpy of incoming combustion air. (6) "Heat output" means the enthalpy of the working fluid output of a water heater. (7) "Manufactured home" means a prefabricated structure on a permanently attached chassis, which structure satisfies the federal manufactured home construction safety standard, as defined in section 24-32-3302 (13). (8) "NOx" means the sum of nitric oxide and nitrogen dioxide. (9) "Rated heat input capacity" means the heat input capacity specified on the nameplate of a water heater. If a water heater has been altered or modified such that its maximum heat input is different from the heat input capacity specified on the nameplate, the new maximum heat input is the water heater's rated heat input capacity. (10) "Recreational vehicle" means a motor home, travel trailer, truck camper, or camping trailer, with or without motive power, that is designed for human occupancy and for recreational, emergency, or other use. (11) "Water heater" means a device that heats water by combustion of fuel or through the use of electricity to a thermostatically controlled temperature not exceeding two hundred ten degrees Fahrenheit or ninety-nine degrees Celsius, for use external to the device, at a pressure not exceeding one hundred sixty pounds per square inch gauge.