Global Warming Potential (GWP) in HVAC measures how much heat a refrigerant traps in the atmosphere compared to carbon dioxide over 100 years. For NYC commercial properties, this number now drives equipment selection, regulatory compliance, and long-term capital planning.
The refrigerant landscape shifted significantly in 2025 and 2026. The EPA’s rules under the American Innovation and Manufacturing (AIM) Act set a GWP limit of 700 or below for most new HVAC equipment. That means refrigerants like R-410A, which carries a GWP of 2088, can no longer be used in newly manufactured systems.
For general contractors, property managers, and facility directors in New York City, these changes affect every tenant fit-out, multi-family renovation, and in-kind equipment swap. At Irving Haase & Co., Inc., we work directly with NYC commercial clients to navigate refrigerant transitions through precise plan and spec bidding and in-kind replacements that keep projects on schedule and in compliance.
Key Takeaways
- Refrigerants like R-410A are banned from new equipment as of 2026, making low-GWP alternatives the new standard.
- NYC’s Local Law 97 adds a carbon penalty layer that makes refrigerant selection a direct financial decision for building owners.
- Proper equipment compatibility review and refrigerant management planning are essential before any commercial HVAC replacement.
What Is GWP In HVAC And Why Does It Matter Now?
GWP is no longer just a technical footnote on a spec sheet. It now determines what equipment can be installed, what refrigerants can be purchased, and how much a building’s carbon footprint costs in annual penalties.
How Global Warming Potential Measures Refrigerant Impact
Global Warming Potential compares a gas’s heat-trapping ability to carbon dioxide, which has a baseline GWP of 1. A refrigerant with a GWP of 2000 traps 2000 times more heat than the same mass of CO2 over a 100-year period.
The calculation factors in two things: radiative forcing (how much energy the gas absorbs) and atmospheric lifetime (how long it stays active). R-410A has a GWP of 2088. R-454B comes in at 466. That difference is the regulatory dividing line right now.
Why Refrigerants Matter Alongside Energy Use And Carbon Footprint
Energy efficiency gets most of the attention in commercial HVAC planning. Refrigerant emissions often get overlooked until a leak occurs.
When a high-GWP refrigerant escapes from a system, even a small release can represent the equivalent of many tons of CO2. For NYC buildings already managing carbon budgets under Local Law 97, a refrigerant leak is not just an equipment problem. It is a compliance problem with real financial exposure.
Selecting lower-GWP refrigerants reduces that risk at the point of installation, not after the fact.
How Greenhouse Gases Shape HVAC Environmental Impact
Hydrofluorocarbons (HFCs) like R-410A are potent greenhouse gases. They do not deplete the ozone layer the way older refrigerants did, but their climate impact is significant.
The HVAC sector accounts for a meaningful share of HFC emissions globally. As building counts rise and cooling demand increases in urban markets like New York City, the cumulative effect of high-GWP refrigerants compounds quickly. Transitioning to lower-GWP alternatives is one of the most direct ways commercial properties can reduce their emissions profile.
Which Refrigerants Are Driving Commercial HVAC Decisions In 2026?
The shift away from R-410A is already complete at the manufacturing level. What matters now is which replacements are viable for commercial tenant renovations, multi-family retrofits, and in-kind equipment swaps in NYC buildings.
How R-410A Compares With R-32 And R-454B
R-410A (GWP 2088) is no longer available in new equipment as of 2026. The two primary successors in commercial split and VRF applications are R-32 and R-454B.
| Refrigerant | GWP | Classification | Status |
|---|---|---|---|
| R-410A | 2088 | A1 (non-flammable) | Banned in new equipment (2026) |
| R-32 | 675 | A2L (mildly flammable) | Growing commercial adoption |
| R-454B | 466 | A2L (mildly flammable) | New standard for many systems |
R-32 offers a 68% GWP reduction versus R-410A. R-454B cuts it further. Both require updated service protocols due to their A2L classification.
Where R-22 Still Affects Legacy Equipment Planning
R-22 (GWP 1810) was phased out of production years ago, but it still circulates in older commercial systems. Buildings still running R-22 equipment face two compounding problems: sourcing reclaimed refrigerant at increasing cost, and operating systems that cannot accept modern low-GWP alternatives without full replacement.
For property managers in NYC, any R-22 equipment still in service should be flagged in the capital planning schedule now. Waiting for failure is the most expensive option.
When Natural Refrigerants Enter The Conversation
Natural refrigerants like R-290 (propane, GWP 3) and CO2 (R-744, GWP 1) offer the lowest climate impact available. R-1234yf carries a GWP of just 4.
These options appear more often in commercial refrigeration than in comfort cooling applications. Flammability classifications and system redesign requirements limit their use in most standard commercial HVAC configurations in multi-tenant buildings. They are worth tracking for future projects but are not yet the default choice for typical NYC tenant fit-outs.
How To Use A Refrigerant GWP Chart For Planning
A refrigerant GWP chart gives facility managers a fast reference for comparing options against the EPA’s 700 GWP threshold. When reviewing equipment submittals or evaluating bids, confirming the refrigerant type and its GWP value should be a standard checklist item.
Any system specifying a refrigerant above 700 GWP should be flagged immediately. Most new commercial equipment now ships with R-32 or R-454B by default, but verification matters before purchase orders are issued.
What Do The AIM Act And Global Rules Mean For NYC Properties?
Federal law, international agreements, and New York City’s own carbon regulations now overlap directly on HVAC refrigerant decisions. Commercial properties in NYC face requirements from multiple directions simultaneously.
How The AIM Act Changes New Equipment Choices
The American Innovation and Manufacturing (AIM) Act directs the EPA to phase down HFC production and consumption by 85% by 2036. The practical effect for commercial facilities arrived in stages.
As of January 1, 2025, manufacturers could no longer produce or import systems using refrigerants above 700 GWP for most HVAC applications. As of January 1, 2026, those systems can no longer be installed. Every new commercial HVAC unit being specified or bid today must meet this threshold.
Why The Montreal Protocol And Kigali Amendment Still Matter
The Montreal Protocol established the original framework for phasing out ozone-depleting refrigerants like R-22. The Kigali Amendment, adopted in 2016, extended that framework to cover HFCs based on their climate impact rather than ozone impact.
The United States ratified the Kigali Amendment, aligning domestic AIM Act timelines with international phase-down schedules. For NYC property owners working with international manufacturers or sourcing equipment through global supply chains, this alignment matters. It means supply constraints on high-GWP refrigerants are not just a domestic issue.
What Local Law 97 Means For Replacement Planning
Local Law 97 caps carbon emissions for most NYC buildings over 25,000 square feet. Buildings exceeding their emissions limits face annual fines calculated per ton of CO2 equivalent.
Refrigerant GWP connects directly to this calculation. A system leak involving a high-GWP refrigerant increases a building’s emissions tally. Selecting lower-GWP equipment at replacement reduces baseline exposure. For any building already near its LL97 threshold, refrigerant selection during an HVAC changeout is a financial decision, not just an environmental one.
What Should NYC Facility Managers Know Before Replacing Equipment?
Equipment selection is only part of the replacement decision. For NYC commercial buildings and multi-family properties, compatibility, safety classifications, and project type all shape how a replacement gets executed.
Why Equipment Compatibility Cannot Be Assumed
New low-GWP refrigerants are not drop-in replacements for R-410A systems. Compressors, expansion valves, seals, and lubricants in existing equipment are engineered for specific refrigerants.
Attempting to use R-32 or R-454B in a system designed for R-410A can cause equipment failure and void warranties. Every replacement project should begin with a full compatibility review of the existing infrastructure before any equipment is specified.
What A2L Refrigerants Mean For Service And Safety
R-32 and R-454B are both classified as A2L: low toxicity but mildly flammable. This classification triggers specific requirements for equipment installation, ventilation, and technician handling.
NYC building environments, particularly in enclosed mechanical rooms or occupied tenant spaces, require attention to A2L safety protocols. Technicians must be trained for A2L handling. Leak detection considerations should be part of any system design review in enclosed commercial spaces.
How Heat Pumps Fit Into Commercial Replacement Strategy
Heat pumps are increasingly viable for commercial tenant spaces and multi-family applications in NYC. Most current commercial heat pump equipment ships with R-32 or R-454B, placing them already in compliance with AIM Act GWP limits.
For buildings working toward LL97 compliance, switching from gas-fired heating to an all-electric heat pump system can reduce carbon exposure meaningfully. The equipment decision and the emissions strategy should be evaluated together.
When In-Kind Replacements Make Sense In Tenant And Multi-Family Projects
In-kind replacement, swapping existing equipment with a current-generation equivalent, is often the most practical path for occupied commercial spaces and luxury multi-family buildings. It minimizes downtime, fits within existing mechanical spaces, and avoids the complexity of full system redesign.
The key shift now is that an in-kind replacement no longer means specifying the same refrigerant. The replacement unit will use a low-GWP alternative by default. Confirming that the new unit’s refrigerant classification, service requirements, and safety protocols are accounted for in the project scope is essential before work begins.
How Should Buildings Handle Refrigerant Management And Risk?
Good refrigerant management protects the environment, supports compliance, and avoids unnecessary cost. For NYC commercial properties, the risks of poor management are both regulatory and financial.
Why Refrigerant Recovery Is Essential During Changeouts
Federal law under EPA Section 608 requires refrigerant recovery before any equipment is opened or disposed of. Venting refrigerant to the atmosphere is illegal regardless of GWP value.
During commercial HVAC changeouts, recovered refrigerant must be handled by EPA Section 608-certified technicians using certified recovery equipment. This is a baseline requirement, not optional. Buildings should confirm that any contractor performing a changeout follows proper recovery procedures and can document it.
How Leak Prevention Supports Compliance And Emissions Goals
Refrigerant leaks are both an environmental and a financial problem. Systems low on refrigerant run inefficiently, increasing energy costs and wear. Leaked high-GWP refrigerant adds directly to a building’s carbon emissions tally.
Regular leak inspections, particularly for older commercial equipment, reduce exposure. For NYC buildings managing LL97 carbon budgets, a documented leak prevention program is a concrete tool for keeping emissions in check.
What Documentation Matters For Ongoing Refrigerant Management
Service records should capture refrigerant type, quantity added, leak inspections performed, and recovery actions taken. This documentation supports EPA compliance, helps track equipment performance trends, and provides clear records if a building faces emissions scrutiny.
For properties with multiple HVAC systems across floors or tenant spaces, centralized refrigerant tracking simplifies audits and supports long-term capital planning decisions.
Why Work With Irving Haase & Co., Inc. On Commercial HVAC Replacements?
Irving Haase & Co., Inc. has served NYC commercial and luxury multi-family clients for over 40 years. Our work is built around plan and spec bidding and precise in-kind equipment replacements across New York City, Brooklyn, and Queens.
How Irving Haase Supports Plan And Spec Bidding
Plan and spec bidding means our proposals are built directly from the engineer’s drawings and specifications. There is no substitution of cheaper equipment or deviation from the project documents.
For general contractors and property managers navigating AIM Act compliance, this approach ensures that every unit specified meets the current GWP requirements and that the refrigerant type, A2L handling protocols, and equipment compatibility are addressed in the bid from day one.
Where Irving Haase Adds Value In White-Box And Tenant Renovation Work
Commercial tenant renovations and white-box buildouts require coordination across tight schedules and occupied buildings. Equipment deliveries, mechanical room access, and phased installation all need to move without disrupting adjacent tenants or building operations.
Our team understands NYC building logistics from decades of working in this market. We bring that operational knowledge directly to every tenant fit-out and renovation project we take on.
What NYC Clients Can Expect From A Responsive Commercial HVAC Contractor
Clients consistently describe our team as responsive, professional, and reliable from first contact through project completion. When refrigerant regulations shift or equipment lead times change, we communicate early and provide practical solutions rather than surprises.
Call Irving Haase & Co., Inc. today at (718) 271-4100 or visit irvinghaase.com to request a competitive plan and spec mechanical bid or schedule an in-kind equipment replacement in NYC, Brooklyn, or Queens.
Frequently Asked Questions
What does global warming potential mean in the context of refrigerants?
Global Warming Potential (GWP) measures how much heat a refrigerant traps in the atmosphere compared to carbon dioxide over a 100-year period. A refrigerant with a GWP of 1000 has 1000 times the climate impact of an equal mass of CO2. In commercial HVAC, this value determines which refrigerants are permitted in new equipment under current EPA regulations.
How is the global warming potential of a refrigerant calculated and measured?
GWP is calculated by measuring a gas’s radiative forcing (how much energy it absorbs) and its atmospheric lifetime (how long it stays active), then comparing both values against CO2 as the baseline of 1. The Intergovernmental Panel on Climate Change (IPCC) publishes these values after scientific review. Most HVAC regulations use the 100-year GWP timeframe.
Which refrigerants have the lowest global warming potential for common air-conditioning systems?
R-32 (GWP 675) and R-454B (GWP 466) are the two most common low-GWP options in current commercial HVAC equipment. Natural refrigerants like R-1234yf (GWP 4) and CO2 (GWP 1) are the lowest available but are used primarily in specialized applications rather than standard commercial comfort cooling.
What is the global warming potential of R-410A compared to newer alternatives?
R-410A carries a GWP of 2088, making it one of the highest-impact refrigerants used in commercial HVAC systems. R-32 reduces that figure by roughly 68%, and R-454B reduces it by about 78%. These differences are why the EPA banned R-410A from new equipment starting in 2026.
How do the global warming potentials of R-22 and R-12 compare, and why does it matter?
R-22 has a GWP of approximately 1810, while R-12 (an older CFC refrigerant) carries a GWP of around 10,900. Both have been phased out, but the comparison matters because legacy equipment still using R-22 represents significant climate risk when leaks occur. Buildings with R-22 systems should prioritize replacement planning now.
What refrigerant regulations or phase-down requirements affect refrigerant selection in air-conditioning and refrigeration systems?
The AIM Act directs the EPA to phase down HFC production by 85% by 2036, with a 700 GWP limit already in effect for most new HVAC equipment as of 2025 to 2026. NYC buildings also face Local Law 97 carbon penalties that make high-GWP refrigerant leaks a direct financial liability. Together, these rules make low-GWP refrigerant selection the only viable path for new commercial installations.