Controlling Emissions from Water Heaters, Small Boilers, and Process Heaters
This page last updated 04/16/2009
The regulations described on this page set NOx emission limits on water heaters, small boilers, and process heaters. This page also provides information and complete rule packages relating to this control measure.
Background
Area affected: Statewide
Source type: Area source
Emissions targeted: Nitrogen oxides (NOx)
Rule/Citation: 30 TAC 117 Subchapter E, Division 3 
Description: These rules are part of the State Implementation Plan and are intended to reduce statewide emissions of NOx. To comply with these rules, manufacturers, installers, distributors and dealers in Texas will need to ensure that water heaters, small boilers, and process heaters meet standards adopted in §117.3205 .
The following are exempt from these rules: units which use fuel other than natural gas, units used in recreational vehicles, and other units which are exempt as defined in §117.3203 .
Rulemaking Documents
These files are available in PDF (PDF Help).
| Title | Date | Log Number | Associated SIP | |
| Adoption | May 23, 2007 | 2006-034-117-EN | DFW SIP May 2007 |  |
| Proposal | Dec 13, 2006 | 206-034-117-EN | DFW SIP Dec 2006 | |
| Adoption | Dec 1, 2004 | 2004-076-117-AI | HGB SIP Dec 2004 | |
| Proposal | Aug 11, 2004 | 2004-076-117-AI | HGB SIP Dec 2004 | |
| Adoption | Dec 13, 2002 | 2002-038-117-AI | HGB SIP Dec 2002 | |
| Proposal | Jun 5, 2002 | 2002-038-117-AI | HGB SIP Dec 2002 | |
| Adoption | Apr 19, 2000 | 1999-055I-117-AI | DFW SIP Apr 2000 | |
| Proposal | Dec 16, 1999 | 1999-055I-117-AI | DFW SIP Apr 2000 | |
The Technical and Economic Feasibility Study was specified by the 79th Texas Legislature (2005) and completed in December 2005 to determine the technical and economic feasibility of regulating residential water heaters in Texas.
Recent and Upcoming Activities
Executive Director (ED) signs Enforcement Discretion for Natural Gas-Fired Water Heaters manufactured on or after January 1, 2007.
