In plain English
FAR 52.223-20, Aerosols, is a contract clause prescribed at FAR 23.109(d)(3), most recently dated May 2024. The complete official text is reproduced below, verbatim, from GSA's published FAR source files.
Its text contains no sentence requiring insertion into subcontracts; see the flowdown section below for what that does and does not mean.
Does it flow down to subcontracts?
No flowdown mandate found in the clause text
We scanned the full clause text and found no sentence directing the contractor to insert this clause into subcontracts. That is a statement about the text, not legal advice: a prime contractor may still flow terms down contractually, an agency supplement (DFARS, VAAR, …) may add requirements, and clauses listed below (if any) may order this clause into subcontracts from the outside.
Where it's prescribed
As prescribed in 23.109(d)(3), insert the following clause:
Prescribing reference: FAR 23.109(d)(3).
The official text, verbatim
As prescribed in 23.109(d)(3), insert the following clause:
Aerosols (May 2024)
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(a) Definitions. As used in this clause–
Global warming potential means how much a given mass of a chemical contributes to global warming over a given time period compared to the same mass of carbon dioxide. Carbon dioxide’s global warming potential is defined as 1.0.
High global warming potential hydrofluorocarbons means any hydrofluorocarbons in a particular end use for which EPA’s Significant New Alternatives Policy (SNAP) program has identified other acceptable alternatives that have lower global warming potential. The SNAP list of alternatives is found at 40 CFR part 82 subpart G with supplemental tables of alternatives available at (https://www.epa.gov/snap/).
Hydrofluorocarbons means compounds that only contain hydrogen, fluorine, and carbon.
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(b) Unless otherwise specified in the contract, the Contractor shall reduce its use, release, or emissions of high global warming potential hydrofluorocarbons, when feasible, from aerosol propellants or solvents under this contract. When determining feasibility of using a particular alternative, the Contractor shall consider environmental, technical, and economic factors such as–
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(1) In-use emission rates, energy efficiency;
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(2) Safety, such as flammability or toxicity;
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(3) Ability to meet technical performance requirements; and
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(4) Commercial availability at a reasonable cost.
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(c) The Contractor shall refer to EPA's SNAP program to identify alternatives. The SNAP list of alternatives is found at 40 CFR part 82 subpart G with supplemental tables available at https://www.epa.gov/snap/.
(End of clause)