Md. Code Regs. 26.11.33.03
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 | January 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 | January 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 | January 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 | January 1, 2021 |
Remote condensing units (retrofit) | R-404A, R-407B, R-421B, R-422A, R-422C, R-422D, R428A, R-434A, R-507A | January 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 | January 1, 2021 |
Stand-alone units (retrofit) | R-404A, R-507A | January 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 | January 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) | January 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) | January 1, 2021 |
Vending machines (retrofit) | R-404A, R-507A | January 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 | January 1, 2021 |
Flexible polyurethane | HFC-134a, HFC-245fa, HFC-365mfc, and blends thereof | January 1, 2021 |
Integral skin polyurethane | HFC-134a, HFC-245fa, HFC-365mfc, and blends thereof; Formacel TI, Formacel Z-6 | January 1, 2021 |
Polystyrene extruded sheet | HFC-134a, HFC-245fa, HFC-365mfc, and blends thereof; Formacel TI, Formacel Z-6 | January 1, 2021 |
Phenolic insulation board and bunstock | HFC-143a, HFC-134a, HFC-245fa, HFC-365mfc, and blends thereof | January 1, 2021 |
Rigid polyurethane slabstock and other | HFC-134a, HFC-245fa, HFC-365mfc and blends thereof; Formacel TI, Formacel Z-6 | January 1, 2021 |
Rigid polyurethane appliance foam | HFC-134a, HFC-245fa, HFC-365mfc and blends thereof; Formacel TI, Formacel Z-6 | January 1, 2021 |
Rigid polyurethane commercial refrigeration and sandwich panels | HFC-134a, HFC-245fa, HFC-365mfc, and blends thereof; Formacel TI, Formacel Z-6 | January 1, 2021 |
Polyolefin | HFC-134a, HFC-245fa, HFC-365mfc, and blends thereof; Formacel TI, Formacel Z-6 | January 1, 2021 |
Rigid polyurethane marine flotation foam | HFC-134a, HFC-245fa, HFC-365mfc and blends thereof; Formacel TI, Formacel Z-6 | January 1, 2021 |
Polystyrene extruded boardstock and billet (XPS) | HFC-134a, HFC-245fa, HFC-365mfc, and blends thereof; Formacel TI, Formacel B, Formacel Z-6 | July 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 | July 1, 2021 |
Rigid polyurethane (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 | July 1, 2021 |
Rigid polyurethane (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 | July 1, 2021 |
End-Use Category | Prohibited Substances | Acceptable Uses |
Aerosol propellants | HFC-134a | Cleaning products for removal of grease, flux, and other soils from electrical equipment; refrigerant flushes; products for sensitivity testing of smoke detectors; lubricants and freeze sprays for electrical equipment or electronics; sprays for aircraft maintenance; sprays containing corrosion preventive compounds used in the maintenance of aircraft, electrical equipment or electronics, or military equipment; pesticides for use near electrical wires, in aircraft, in total release insecticide foggers, or in certified organic use pesticides for which EPA has specifically disallowed all other lower-GWP propellants; mold release agents and mold cleaners; lubricants and cleaners for spinnerettes for synthetic fabrics; duster sprays specifically for removal of dust from photographic negatives, semiconductor chips, specimens under electron microscopes, and energized electrical equipment; adhesives and sealants in large canisters; document preservation sprays; FDA-approved MDIs for medical purposes; wound care sprays; topical coolant sprays for pain relief; and products for removing bandage adhesives from skin. |
Aerosol propellants | HFC-227ea and blends of HFC-227ea and HFC-134a | FDA-approved MDIs for medical purposes. |
Air conditioning | HFC-134a | Military marine vessels where reasonable efforts have been made to ascertain that other alternatives are not technically feasible due to performance or safety requirements. |
Air conditioning | HFC-134a and R-404A | Human-rated spacecraft and related support equipment where reasonable efforts have been made to ascertain that other alternatives are not technically feasible due to performance or safety requirements. |
Foams - except rigid polyurethane (PU) spray foam | All substances | Military applications where reasonable efforts have been made to ascertain that other alternatives are not technically feasible due to performance or safety requirements until January 1, 2022. |
Foams - except rigid polyurethane (PU) spray foam | All substances | Space- and aeronautics-related applications where reasonable efforts have been made to ascertain that other alternatives are not technically feasible due to performance or safety requirements until January 1, 2025. |
Rigid polyurethane (PU) two-component spray foam | All substances | Military or space- and aeronautics-related applications where reasonable efforts have been made to ascertain that other alternatives are not technically feasible due to performance or safety requirements until January 1, 2025. |
Md. Code Regs. 26.11.33.03