Glossary term
A number comparing a refrigerant's climate effect with that of carbon dioxide over a set period (100 years in most rules, 20 in some). The refrigerant rules in both states are written as GWP limits by equipment category.
In plain language: How much warming a pound of the refrigerant causes compared with carbon dioxide.
Jurisdiction: New York's Part 494 uses GWP100 for air conditioning and GWP20 for some refrigeration categories.
Playbooks Compliance by Regime
A quoted replacement comes with a refrigerant deadline attached. In New York the R-410A sell-through closes January 1, 2027; in New Jersey the equipment stays legal to install. What that…
