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Controlling NOx Emissions from Water Heaters, Small Boilers, and Process Heaters

Rules in Title 30, Texas Administrative Code, Chapter 117 for controlling emissions of nitrogen oxides from water heaters, small boilers, and process heaters. These rules are part of the State Implementation Plan strategy to meet the National Ambient Air Quality Standards for ozone.

Areas Affected

Rules apply statewide.

Rule Citation

30 TAC Chapter 117, Subchapter E, Division 3

Description of Rules

  • NOx emission specifications apply to manufacturers, distributors, retailers, and installers of natural gas-fired water heaters, boilers, and process heaters with a maximum rated capacity of 2.0 million British thermal units per hour or less.
  • Includes certification, notification, and labeling requirements.

Rule History

The Chapter 117 rule history for water heaters, small boilers, and process heaters discusses revisions to the rules, including their proposal and adoption, the associated State Implementation Plan revision, and U.S. Environmental Protection Agency approval.

Compliance Resources


Contact Information