The following additional definitions apply to R307-230:
"Heat output" means the enthalpy of the working fluid output of the unit.
"Recreational vehicle" means a motor home, travel trailer, truck camper, or camping trailer, with or without motive power, designed for human habitation for recreational, emergency, or other occupancy.
"Natural gas-fired water heater" means a device that heats water by the combustion of natural gas to a thermostatically-controlled temperature not exceeding 210 degrees F (99 degrees C)for use external to the vessel at pressures not exceeding 160 psig.
Utah Admin. Code R307-230-4