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Regulatory Development and Retrospective Review Tracker

Standards of Performance for New Residential Wood Heaters and New Residential Hydronic Heaters and Forced-Air Furnaces

a.k.a. NSPS Review for Residential Wood Heaters (subparts AAA and QQQQ)

RIN: 2060-AP93 (What's this?)

Docket No.: EPA-HQ-OAR-2009-0734 (What's this?)

Current Phase: Proposal (What's this?)

On February 3, 2014, EPA published proposed revisions to the New Source Performance Standards (NSPS) for new residential wood heaters.

This action is necessary because it updates the 1988 NSPS to reflect significant advancements in wood heater technologies and design, broadens the range of residential wood-heating appliances covered by the regulation, and improves and streamlines implementation procedures. This rule is expected to require manufacturers to redesign wood heaters to be cleaner and lower emitting. In general, the design changes would also make the heaters perform better and be more efficient. The revisions are also expected to streamline the process for testing new model lines by allowing the use of International Standards Organization (ISO)-accredited laboratories and certifying bodies, which will expand the number of facilities that can be used for testing and certification of the new model lines. This action is expected to include the following new residential wood-heating appliances: adjustable burn rate wood heaters, pellet stoves, single burn rate wood heaters, outdoor hydronic heaters (outdoor wood boilers), indoor hydronic heaters (indoor wood boilers), wood-fired forced air furnaces, and masonry heaters. These standards would apply only to new residential wood heaters and not to existing residential wood-heating appliances. The final rule has a consent decree of February 3, 2015.

NPRM: Sent to OMB for Regulatory Review07/25/2013
NPRM: Received by OMB07/26/2013
NPRM: Regulatory Review Concluded01/02/2014
NPRM: Comment Period Open02/03/2014
NPRM: Published in FR02/03/2014
NPRM: Comment Period Closed05/05/2014
NODA: Published in FR07/01/2014
NODA: Comment Period Open07/01/2014
NODA: Comment Period Closed07/31/2014
Final Rule: Sent to OMB for Regulatory Review12/10/2014
Final Rule: Received by OMB12/12/2014
Final Rule: Regulatory Review Concluded02/02/2015
Final Rule: Published in FR02/2015 (projected)

Potential Effects

Federal Government - other agencies
Likely to be involved in the implementation of this rule.

Local Governments
Likely to be involved in the implementation of this rule.

Small Entities
EPA notifies the public when a rulemaking is likely to 1) have any adverse economic impact on small entities even though a Regulatory Flexibility Analysis may not be required and/or 2) have significant adverse economic impacts on a substantial number of small entities. The term "small entities" includes small businesses, small governments, and small not-for-profits. (Read a longer explanation on our Small Entities web page.) This rulemaking is likely to impact small entities in the following way(s):
  • Likely to have any adverse economic impact on:
    • small businesses
  • Likely to have a significant adverse economic impact on a substantial number of these small entities:
    • small businesses

In addition, small governments are:

  • Likely to be involved in the implementation of this rule.

State Governments
Likely to be involved in the implementation of this rule.

Tribal Governments
Likely to be involved in the implementation of this rule.

Participate / Learn More Regulatory Review

Some of EPA's rulemakings undergo regulatory review (What's this?), as prescribed by Executive Order 12866 and coordinated by the Office of Management and Budget (OMB). The following list describes which of this rulemaking's stages have completed review and published in the Federal Register, if any, and provides links to the review documents where available. Consult the "Timeline" section of this Web page for the dates of each review.

  • NPRM - No Information Available.
  • Final Rule - This stage of the rulemaking underwent review.
Citations & Authorities

Federal Register Citations

Code of Federal Regulations (CFR) Citation
40 CFR 60

Legal Authority
CAA Section 111(b)(1)(B)


This site provides summaries of priority rulemakings and priority retrospective reviews of existing regulations. We update most of the site at the beginning of each month, though some data is updated more frequently if it is time sensitive. The information on this site is not intended to and does not commit EPA to specific conclusions or actions. For example, after further analysis, EPA may decide the effects of a rule would be different or it may decide to terminate a rulemaking.

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