(1) As used in this section: (a) "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 Fahrenheit for use external to the vessel at pressures not exceeding 160 pounds per square inch gauge. (b) "Ozone nonattainment area" means an area that does not meet the primary or secondary air quality standards for ozone under the national ambient air quality standards described in 42 U.S.C. Sec. 7407(d). (c) "PM2.5 nonattainment area" means an area that does not meet the primary or secondary air quality standards for fine particulate matter, PM2.5, under the national ambient air quality standards described in 42 U.S.C. Sec. 7407(d). (d) "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. (2) A person may not sell or purchase a natural gas-fired water heater that is manufactured after July 1, 2018 with the intent to install it in Utah if the natural gas-fired water heater exceeds the applicable nitrogen oxide emission rate limit set in Title 15A, State Construction and Fire Codes Act. (3) A manufacturer in Utah shall display the model number and nitrogen oxide emission rate of a water heater complying with this section on: (a) the shipping carton for the water heater; and (b) the permanent rating plate of each water heater unit. (4) This section does not apply to a water heater unit that: (a) uses a fuel other than natural gas; (b) is used in a recreational vehicle; (c) is manufactured in Utah for shipment and use outside of Utah; or (d) is intended to be installed in an area of Utah that is not included in an ozone nonattainment area or a PM2.5 nonattainment area.
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