Code of Maryland Regulations › Title 26 - DEPARTMENT OF ENVIRONMENT › Part 2 - SUBTITLES 08-12 › Subtitle 11 - AIR QUALITY › Chapter 26.11.33 - Prohibitions on Use of Certain Hydrofluorocarbons in Aerosol Propellants, Chillers, Foam, and Stationary Refrigeration End-Uses › Section 26.11.33.03 - List of Prohibited Substances

Current through Register Vol. 51, No. 14, July 12, 2024
A. The table under §B of this regulation
				  lists prohibited substances in specific end-uses and the applicable effective
				  date of prohibition, unless an exemption is provided for in §C of this
				  regulation. The prohibitions do not apply to products or equipment manufactured
				  for listed end-uses prior to an applicable effective date.
B. 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
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
C.
				  Table 2 - HFC Prohibition Exemptions. The following table lists exemptions to
				  the prohibitions in §B of this regulation.
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.