      For the reasons set forth in the preamble, 40 CFR part 60 is amended as follows: 
PART 60 -- STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES 
1. The authority citation for part 60 continues to read as follows: 
Authority: 42 U.S.C. 7401 et seq. 
Subpart AAA -- Standards of Performance for New Residential Wood Heaters
2. Section 60.532 is amended by revising paragraph (b) to read as follows:
§60.532 What standards and associated requirements must I meet and by when?
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	(b) 2020 particulate matter emission standards. Unless exempted under §60.530(b) or electing to use the cord wood alternative means of compliance option in paragraph (c) of the section, each affected wood heater manufactured or sold at retail for use in the United States on or after May 15, 2020 must not discharge into the atmosphere any gases that contain particulate matter in excess of a weighted average of 2.0 g/hr (0.0044 lb/hr). However, an affected wood heater manufactured or imported on or before May 15, 2020, and certified as of May 15, 2020, to meet the 2015 particulate matter emission limit in paragraph (a) of this section may be sold at retail on or before November 30, 2020. Compliance for all heaters must be determined by the test methods and procedures in §60.534.
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3. Section 60.533 is amended by revising paragraphs (h)(1) and (h)(2) to read as follows.
§60.533 What compliance and certification requirements must I meet and by when?
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      (h) ***
      (1) For a model line that was previously certified as meeting the 1990 Phase II emission standards under the 1988 NSPS, in effect prior to May 15, 2015, at an emission level equal to or less than the 2015 emission standards in §60.532(a), the model line is deemed to have a certificate of compliance for the 2015 emission standards in §60.532(a), which is valid until the effective date for the 2020 standards in §60.532(b) (i.e., until May 15, 2020). However, a model line, manufactured or imported on or before May 15, 2020, with a certificate of compliance for the 2015 emission standards that was in effect as of May 15, 2020, may be sold at retail on or before November 30, 2020.
      (2) For a model line certified as meeting emission standards in §60.532, a certificate of compliance will be valid for 5 years from the date of issuance or until a more stringent standard comes into effect, whichever is sooner. 
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Subpart QQQQ -- Standards of Performance for New Residential Hydronic Heaters and Forced-Air Furnaces
4. Section 60.5474 is amended by revising paragraphs (a)(2) and (a)(6) to read as follows.
§60.5474 What standards and associated requirements must I meet and by when?
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      (2) On or after May 15, 2020, manufacture or sell at retail a residential hydronic heater unless it has been certified to meet the 2020 particulate matter emission limit in paragraph (b)(2) or (b)(3) of this section, except that a residential hydronic heater manufactured or imported on or before May 15, 2020, and certified as of May 15, 2020, to meet the 2015 particulate matter emission limit in paragraph (b)(1) of this section, may be sold at retail on or before November 30, 2020.
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      (6) On or after May 15, 2020, manufacture or sell at retail a small or large residential forced-air furnace unless it has been certified to meet the 2020 particulate matter emission limit in paragraph (b)(6) of this section, except that a small or large residential forced-air furnace manufactured or imported on or before May 15, 2020, and certified as of May 15, 2020, to meet the applicable particulate matter emission limit in paragraph (b)(4) or (5) of this section, respectively, may be sold at retail on or before November 30, 2020.
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5. Section 63.5475 is amended by revising paragraphs (a)(3) through (7) and (h) to read as follows.
§60.5475 What compliance and certification requirements must I meet and by when?
      (a) ***
      (3) Models qualified as meeting the Phase 2 emission levels under the 2011 EPA hydronic heater partnership agreement are automatically deemed to have a certificate of compliance for the 2015 particulate matter emission standards and be valid until the effective date for the 2020 particulate matter emission standards. However, a model line, manufactured or imported on or before May 15, 2020, with a certificate of compliance for the 2015 emission standards that was in effect as of May 15, 2020 may be sold at retail on or before November 30, 2020.
       (4) Models certified by the New York State Department of Environment and Conservation to meet the emission levels in §60.5474(b) are automatically deemed to have a certificate of compliance for the 2015 particulate matter emission standards and be valid until the effective date for the 2020 particulate matter emission standards. However, a model line, manufactured or imported on or before May 15, 2020, with a certificate of compliance for the 2015 emission standards that was in effect as of May 15, 2020, may be sold at retail on or before November 30, 2020.
      (5) Models approved by the New York State Energy Research and Development Authority under the Renewable Heat New York (RHNY) Biomass Boiler Program are automatically deemed to have a certificate of compliance for the 2015 particulate matter emission standards and be valid until the effective date for the 2020 particulate matter emission standards provided that they comply with the thermal storage requirements in the RHNY program. However, a model line, manufactured or imported on or before May 15, 2020, with a certificate of compliance for the 2015 emission standards that was in effect as of May 15, 2020, may be sold at retail on or before November 30, 2020.
      (6) Small forced-air furnace models that are certified under CSA B415.1-10 (IBR, see §60.17), by an EPA approved third-party certifier, to meet the 2016 particulate matter emission level will be automatically deemed to have a certificate of compliance for the 2016 particulate matter emission standards and be valid until the effective date for the 2020 particulate matter emission standards. However, a model line, manufactured or imported on or before May 15, 2020, with a certificate of compliance for the 2016 emission standards that was in effect as of May 15, 2020, may be sold at retail on or before November 30, 2020.
      (7) Large forced-air furnace models that are certified under CSA B415.1-10 (IBR, see §60.17), by an EPA approved third-party certifier, to meet the 2017 particulate matter emission level will be automatically deemed to have a certificate of compliance for the 2017 particulate matter emission standards and be valid until the effective date of the 2020 particulate matter emission standards. However, a model line, manufactured or imported on or before May 15, 2020, with a certificate of compliance for the 2017 emission standards that was in effect as of May 15, 2020, may be sold at retail on or before November 30, 2020.
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      (h) Certification period. Unless revoked sooner by the Administrator, a certificate of compliance will be valid for 5 years from the date of issuance or until a more stringent standard comes into effect, whichever is sooner. However, a model line, manufactured or imported on or before May 15, 2020, with a certificate of compliance for the applicable 2015, 2016, or 2017 emission standards that was in effect as of May 15, 2020, may be sold at retail on or before November 30, 2020.
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