R307. Environmental Quality, Air Quality.R307-230. NOx Emission Limits for Natural Gas-Fired Water Heaters.
R307-230-1. Purpose.
The purpose of Rule R307-230 is to reduce emissions of nitrogen oxides (NOx) from natural gas-fired water heaters.
R307-230-2. Applicability.
Rule R307-230 applies to the sale or installation of natural gas-fired water heaters on or after July 1, 2018, as limited by Subsection 19-2-107.7(4).
R307-230-3. Emission Limits and Requirements.
(1) The State Construction and Fire Codes Act, Section 15A-6-102, Enacted by Chapter 236, 2017 General Session, is incorporated by reference.
(2) Manufacturers shall use the South Coast Air Quality Management District Method 100.1 to comply with the NOx emission limits.
KEY: water heaters, natural gas, NOx, air quality
Date of Last Change: August 6, 2025
Notice of Continuation: July 12, 2022
Authorizing, and Implemented or Interpreted Law: 19-2-101; 19-2-104; 19-2-107.7
