![]() Rule 23 Supplemental proposal on foams and withdrawal notice Proposed Rule Fact Sheet (PDF 2 pp, 441 KB).Proposed Rule (December 6, 2021) (PDF 21 pp, 513 KB).Final Rule Fact Sheet (PDF 2 pp, 376 KB).Adds a reference to EPA’s regulations under the Toxic Substances Control Act for HFO-1234yf for the proposed listings in nonroad vehicles and previous listings for certain onroad vehicles.Requires unique servicing fittings for small refrigerant cans (two pounds or less) of HFO-1234yf that are used to service MVAC systems in both onroad and nonroad vehicles. Lists HFO-1234yf as acceptable, subject to use conditions, for MVAC systems in certain nonroad vehicles.Īdopts the current versions of the industry standards SAE J639, SAE J1739, and SAE J2844 in the use conditions for the proposed listings of HFO-1234yf in nonroad vehicles and previous listings for certain onroad vehicles. This action expands the list of substitutes for motor vehicle air conditioning (MVAC). Rule 24 - Listing of HFO-1234yf under the Significant New Alternatives Policy Program for Motor Vehicle Air Conditioning in Nonroad Vehicles and Servicing Fittings for Small Refrigerant Cans Proposed Rule Fact Sheet (PDF 3 pp, 295 K).Adopt the current versions of three industry standards by incorporating them by reference into the relevant use conditions.List three fire suppressants as acceptable, subject to use conditions and.List one refrigerant as acceptable, subject to use conditions and narrowed use limits, for use in very low temperature laboratory equipment.Revise use conditions for one refrigerant, for use in self-contained air conditioners and heat pumps for residential and light commercial use.List one refrigerant as acceptable, subject to use conditions, for use in non-residential dehumidifiers.List six refrigerants as acceptable, subject to use conditions, for use in air conditioning in commercial and industrial buildings (“chillers”) and residential dehumidifiers.This action proposes to list substitutes for the refrigeration and air conditioning and the fire suppression sectors. without restriction are listed below in Notices of Acceptability Proposed Rule 25 - Listing of Substitutes under the Significant New Alternatives Policy Program in Refrigeration, Air Conditioning, and Fire Suppression Note that all SNAP determinations apply to the use of a specific product as a substitute for a specific ODS in a specific end-use. For example, HCFC-22 is an acceptable substitute for R-502 in industrial process refrigeration. Substitutes that are acceptable acceptableThis designation means that a substitute may be used, without restriction, to replace the relevant ODS within the end-use specified. ![]() Use of the substitute in the end-use is legal only in those applications included within the narrowed use limit. This designation is generally used when the specific characteristics of different applications within an end-use result in differences in risk. Note that all SNAP determinations apply to the use of a specific product as a substitute for a specific ODS in a specific end-use., and acceptable subject to narrowed use limits acceptable subject to narrowed use limitsThis designation indicates means that a substitute would be unacceptable unless its use was restricted to specific applications within an end-use. , acceptable to use conditions acceptable to use conditionsThis designation means that a substitute may be used, without restriction, to replace the relevant ODS within the end-use specified. For example, HCFC-141b is an unacceptable substitute for CFC-11 in building chillers. ![]() The following rules list substitutes that have been determined unacceptable unacceptableThis designation means that it is illegal to use a product as a substitute for an ODS in a specific end-use.
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