Statutes, codes, and regulations
Delaware Administrative Code
Title 7 - Natural Resources and Environmental ControlAir Quality Management SectionDivision of Air Quality
Prohibitions on Use of Certain Hydrofluorocarbons in Specific End-Uses
Section 1151-6.0 - List of Prohibited Substances

7 Del. Admin. Code § 1151-6.0

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Current through Register Vol. 28, No. 7, January 1, 2025
Section 1151-6.0 - List of Prohibited Substances
6.1 End-use and prohibited substances
6.1.1 The following table lists prohibited substance in specific end-uses and the effective date of prohibition, unless an exemption is provided for in Section 7.0:

Table 1. End-use and Prohibited substances
End-use Category: Aerosol Propellants
End-use Prohibited Substances Effective Date
Aerosol Propellants HFC-125, HFC-134a, HFC-227ea and blends of HFC-227ea and HFC 134a. September 1, 2021
End-use Category: Air Conditioning
End-use Prohibited Substances Effective Date
Centrifugal chillers (new) FOR12A, FOR12B, HFC-134a, HFC-227ea, HFC-236fa, HFC245fa, R-125/ 134a/ 600a (28.1/70/1.9), R-125/ 290/ 134a/ 600a (55.0/1.0/42.5/1.5), R-404A, R-407C, R-410A, R-410B, R-417A, R-421A, R-422B, R-422C, R-422D, R-423A, R-424A, R-434A, R438A, R-507A, RS-44 (2003 composition), THR-03. January 1, 2024
Positive displacement chillers (new) FOR12A, FOR12B, HFC-134a, HFC-227ea, KDD6, R125/ 134a/ 600a (28.1/70/1.9), R-125/ 290/ 134a/ 600a (55.0/1.0/42.5/1.5), R-404A, R-407C, R-410A, R-410B, R-417A, R-421A, R-422B, R-422C, R-422D, R-424A, R-434A, R-437A, R438A, R-507A, RS-44 (2003 composition), SP34E, THR-03. January 1, 2024
End-use Category: Refrigeration
End-use Prohibited Substances Effective Date
Cold storage warehouses (new) HFC-227ea, R-125/290/134a/600a (55.0/1.0/42.5/1.5), R404A, R-407A, R-407B, R-410A, R-410B, R-417A, R-421A, R421B, R-422A, R-422B, R-422C, R-422D, R-423A, R-424A, R428A, R-434A, R-438A, R-507A, RS-44 (2003 composition). January 1, 2023
Household refrigerators and freezers (new) FOR12A, FOR12B, HFC-134a, KDD6, R-125/290/134a/600a (55.0/1.0/42.5/1.5), R-404A, R-407C, R-407F, R-410A, R-410B, R-417A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R424A, R-426A, R-428A, R-434A, R-437A, R-438A, R-507A, RS24 (2002 formulation), RS-44 (2003 formulation), SP34E, THR-03. January 1, 2022
Household refrigerators and freezers-compact (new) FOR12A, FOR12B, HFC-134a, KDD6, R-125/290/134a/600a (55.0/1.0/42.5/1.5), R-404A, R-407C, R-407F, R-410A, R-410B, R-417A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R424A, R-426A, R-428A, R-434A, R-437A, R-438A, R-507A, RS24 (2002 formulation), RS-44 (2003 formulation), SP34E, THR-03. September 1, 2021
Household refrigerators and freezers-built in appliances (new) FOR12A, FOR12B, HFC-134a, KDD6, R-125/290/134a/600a (55.0/1.0/42.5/1.5), R-404A, R-407C, R-407F, R-410A, R-410B, R-417A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R424A, R-426A, R-428A, R-434A, R-437A, R-438A, R-507A, RS24 (2002 formulation), RS-44 (2003 formulation), SP34E, THR-03. January 1, 2023
Supermarket Systems (Retrofit) R-404A, R-407B, R-421B, R-422A, R-422C, R-422D, R428A, R-434A, R-507A September 1, 2021
Supermarket Systems (New) HFC-227ea, R-404A, R-407B, R-421B, R-422A, R-422C, R-422D, R-428A, R-434A, R-507A. September 1, 2021
Remote Condensing Units (Retrofit) R-404A, R-407B, R-421B, R-422A, R-422C, R-422D, R428A, R-434A, R-507A. September 1, 2021
Remote Condensing Units (New) HFC-227ea, R-404A, R-407B, R-421B, R-422A, R-422C, R-422D, R-428A, R-434A, R-507A. September 1, 2021
Stand-Alone Units (Retrofit) R-404A, R-507A. September 1, 2021
Stand-Alone Medium-Temperature Units (New) FOR12A, FOR12B, HFC-134a, HFC-227ea, KDD6, R125/290/134a/600a (55.0/1.0/42.5/1.5), R-404A, R407A, R-407B, R-407C, R-407F, R-410A, R-410B, R417A, R-421A, R-421B, R-422A, R-422B, R-422C, R422D, R-424A, R-426A, R-428A, R-434A, R-437A, R438A, R-507A, RS-24 (2002 formulation), RS-44 (2003 formulation), SP34E, THR-03. September 1, 2021
Stand-Alone Low-Temperature Units (New) HFC-227ea, KDD6, R-125/290/134a/600a (55.0/1.0/42.5/1.5), R-404A, R-407A, R-407B, R-407C, R-407F, R-410A, R-410B, R-417A, R-421A, R-421B, R422A, R-422B, R-422C, R-422D, R-424A, R-428A, R434A, R-437A, R-438A, R-507A, RS-44 (2003 formulation). September 1, 2021
Refrigerated food processing and dispensing equipment (New) HFC-227ea, KDD6, R-125/ 290/ 134a/ 600a (55.0/1.0/42.5/1.5), R-404A, R-407A, R-407B, R-407C, R-407F, R-410A, R-410B, R417A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R424A, R-428A, R-434A, R-437A, R-438A, R-507A, RS-44 (2003 formulation). September 1, 2021
Vending Machines (Retrofit) R-404A, R-507A. September 1, 2021
Vending Machines (New) FOR12A, FOR12B, HFC-134a, KDD6, R125/290/134a/600a (55.0/1.0/42.5/1.5), R-404A, R407C, R-410A, R-410B, R-417A, R-421A, R-422B, R422C, R-422D, R-426A, R-437A, R-438A, R-507A, RS-24 (2002 formulation), SP34E. January 1, 2022
End-use Category: Foams
End-use Prohibited Substances Effective Date
Rigid Polyurethane and Polyisocyanurate Laminated Boardstock HFC 134a, HFC 245fa, HFC 365mfc, and blends thereof. September 1, 2021
Flexible Polyurethane HFC-134a, HFC-245fa, HFC-365mfc, and blends thereof. September 1, 2021
Integral Skin Polyurethane HFC-134a, HFC-245fa, HFC-365mfc, and blends thereof; Formacel TI, Formacel Z-6. September 1, 2021
Polystyrene Extruded Sheet HFC-134a, HFC-245fa, HFC-365mfc, and blends thereof; Formacel TI, Formacel Z-6. September 1, 2021
Phenolic Insulation Board and Bunstock HFC-143a, HFC-134a, HFC-245fa, HFC-365mfc, and blends thereof. September 1, 2021
Rigid Polyurethane Slabstock and Other HFC-134a, HFC-245fa, HFC-365mfc and blends thereof; Formacel TI, Formacel Z-6. September 1, 2021
Rigid Polyurethane Appliance Foam HFC-134a, HFC-245fa, HFC-365mfc and blends thereof; Formacel TI, Formacel Z-6. September 1, 2021
Rigid Polyurethane Commercial Refrigeration and Sandwich Panels HFC-134a, HFC-245fa, HFC-365mfc, and blends thereof; Formacel TI, Formacel Z-6. September 1, 2021
Polyolefin HFC-134a, HFC-245fa, HFC-365mfc, and blends thereof; Formacel TI, Formacel Z-6. September 1, 2021
Rigid Polyurethane Marine Flotation Foam HFC-134a, HFC-245fa, HFC-365mfc and blends thereof; Formacel TI, Formacel Z-6. September 1, 2021
Polystyrene Extruded Boardstock and Billet (XPS) HFC-134a, HFC-245fa, HFC-365mfc, and blends thereof; Formacel TI, Formacel B, Formacel Z-6. September 1, 2021
Rigid polyurethane (PU) high-pressure two-component spray foam HFC-134a, HFC-245fa, and blends thereof; blends of HFC365mfc with at least 4 percent HFC-245fa, and commercial blends of HFC-365mfc with 7 to 13 percent HFC-227ea and the remainder HFC-365mfc; Formacel TI. September 1, 2021
Rigid PU low-pressure two-component spray foam HFC-134a, HFC-245fa, and blends thereof; blends of HFC365mfc with at least 4 percent HFC-245fa, and commercial blends of HFC-365mfc with 7 to 13 percent HFC-227ea and the remainder HFC-365mfc; Formacel TI. September 1, 2021
Rigid PU one-component foam sealants HFC-134a, HFC-245fa, and blends thereof; blends of HFC365mfc with at least 4 percent HFC-245fa, and commercial blends of HFC-365mfc with 7 to 13 percent HFC-227ea and the remainder HFC-365mfc; Formacel TI. September 1, 2021

6.1.2 Proposed Modifications to List of Prohibited Substances
6.1.2.1 A person subject to the list of prohibited substances in Section 6.0 may request that the Department modify the regulation to exempt hydrofluorocarbon blends with a global-warming-potential of 750 or less in rigid polyurethane low-pressure two-component spray foam and polystyrene extruded boardstock and billet (XPS) from the list of prohibited substances in Section 6.0. The request shall contain the following information:
6.1.2.1.1 A detailed description of the end-use category for which the modification is requested; and
6.1.2.1.2 A demonstration that the U.S. EPA has approved the hydrofluorocarbon blend under the Significant New Alternatives Policy under section 7671(k) of the Clean Air Act.

7 Del. Admin. Code § 1151-6.0

24 DE Reg. 876 (3/1/2021) (final)