Commercial Chiller Refrigerant Guide by Art HVAC NYC Licensed Commercial Refrigeration and Chiller Contractor Experts
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Chiller Refrigerant Guide — Types, Regulations & Best Practices

Apr 1, 2026 10 min read Alex Weber
Quick Read

This article covers:

  • The 5 most common chiller refrigerants and where each is used
  • EPA phase-out timeline: which refrigerants are disappearing and when
  • How refrigerant choice affects efficiency, cost, and compliance
  • Step-by-step transition planning for R-22 and R-123 systems
  • NYC-specific regulations that go beyond federal requirements

Estimated read time: 5 minutes.

Your chiller’s refrigerant isn’t just a technical detail buried in a spec sheet — it’s a regulatory, financial, and operational decision that affects your building for the next 15–25 years. Choose the wrong refrigerant during a retrofit, and you’ll face rising costs, shrinking supply, or outright compliance violations.

The refrigerant landscape is shifting faster than most building owners realize. R-22 is already gone. R-123 is being phased out. Even R-410A — the current standard for smaller systems — faces restrictions starting in 2025. Understanding these transitions is critical for anyone managing commercial HVAC systems in New York.

This guide breaks down every refrigerant you’re likely to encounter, its regulatory status, and exactly what to do if your system uses one that’s being phased out.

The 5 Refrigerants You Need to Know

  1. R-22 (Freon) — PHASED OUT — Production and import banned since January 2020. Only reclaimed R-22 is available, and prices have surged from $10/lb to $50–$150/lb. If your chiller runs on R-22, every recharge is more expensive than the last. Plan your replacement now — not when the next leak forces an emergency decision.
  2. R-134a — CURRENT BUT DECLINING — The workhorse of medium-pressure centrifugal chillers for the past 30 years. GWP of 1,430 means it faces increasing regulatory pressure. Still legal and available, but new installations are increasingly choosing lower-GWP alternatives. If your system runs well on R-134a, no immediate action needed — but plan for transition at next major overhaul.
  3. R-410A — CURRENT, RESTRICTIONS COMING — Standard for residential and light commercial systems (split systems, rooftop units). GWP of 2,088 — higher than R-134a — means it’s first in line for phase-down under the AIM Act. New production equipment must use alternatives by 2025. Existing systems can continue operating and be recharged.
  4. R-513A — NEXT GENERATION — A near-drop-in replacement for R-134a with 56% lower GWP (631 vs 1,430). Same performance, same operating pressures, minimal system modifications needed. This is what most new centrifugal chiller installations are specifying today. If you’re replacing an R-134a chiller, R-513A is the straightforward choice.
  5. R-1233zd / R-1234ze — ULTRA-LOW GWP — HFO refrigerants with GWP under 7 (compared to 1,430 for R-134a). The future of large commercial chillers. Require purpose-built equipment — no retrofit path from existing systems. Best for new construction or complete chiller replacement where 20+ year regulatory stability is a priority.
R-22 Is Already Gone

If your chiller still uses R-22, you’re operating on borrowed time. Reclaimed R-22 prices have increased 400%+ since the 2020 ban, and availability shrinks every year. A single major leak can cost $5,000–$15,000 just for the refrigerant recharge — before repair costs. Every dollar spent on R-22 recharges is money that could go toward a modern, efficient replacement.

REFRIGERANT COST PER POUND

What You’ll Pay to Recharge

R-22 (reclaimed only)$50–$150/lb
R-410A$8–$25/lb
R-134a$5–$18/lb
R-513A$6–$20/lb

* NYC metro area pricing, 2026. R-22 available as reclaimed only. Prices fluctuate with supply.

EPA Regulations & the AIM Act Timeline

The American Innovation and Manufacturing (AIM) Act mandates an 85% reduction in HFC production by 2036. Here’s the timeline that affects your building:

  • 2020 — R-22 production and import fully banned
  • 2025 — New residential/commercial AC equipment must use alternatives to R-410A
  • 2028–2029 — Further restrictions on high-GWP refrigerants in new commercial equipment
  • 2036 — 85% total reduction in HFC production and consumption vs. 2011–2013 baseline

NYC adds its own layer: Local Law 97 sets carbon emission caps for buildings over 25,000 sq ft. Since refrigerant leaks count toward your building’s carbon footprint, high-GWP refrigerants carry a double penalty — both the direct cost of leaked refrigerant and the compliance cost of exceeding your emissions cap.

Every chiller replacement decision made today should assume a 20-year regulatory horizon. Choosing a low-GWP refrigerant now avoids a forced mid-life conversion that can cost 2–3x more than doing it right the first time.

Retrofit or Replace?

Retrofit to New Refrigerant
Lower upfront cost ($15,000–$40,000)
Keeps existing equipment
1–2 week downtime
May lose 5–10% efficiency vs. purpose-built
Best for systems under 12 years old
Limited to compatible refrigerant options
Full Chiller Replacement
Higher upfront cost ($50,000–$200,000+)
Brand new equipment with warranty
2–6 week lead time + installation
Peak efficiency with latest technology
Best for systems 15+ years old
Any refrigerant, including ultra-low GWP
Start Planning 2–3 Years Early

Chiller replacement projects typically take 6–12 months from specification to commissioning. Add engineering, permitting, and NYC DOB approvals, and you’re looking at 12–18 months total. Start evaluating your options 2–3 years before your current system reaches end-of-life. A proactive maintenance program buys you the time to plan instead of react.

Building Your Refrigerant Transition Plan

Whether you’re managing one building or a portfolio, here’s the approach that minimizes disruption and cost:

  1. Audit your current inventory — Document every chiller: make, model, age, refrigerant type, charge size, and leak history
  2. Prioritize by risk — R-22 systems first, then high-leak-rate systems, then systems approaching 15+ years
  3. Model the economics — Compare 10-year total cost of ownership: refrigerant recharges + energy + maintenance vs. new equipment
  4. Choose the right refrigerant — Balance current cost against 20-year regulatory stability. R-513A is the safe middle ground; HFOs are the long-term play
  5. Schedule during low-demand season — Fall or spring, when temporary cooling isn’t needed and contractor availability is best

CHILLER REFRIGERANT

Frequently Asked Questions

Find answers to common questions about our HVAC, plumbing, and refrigeration services.

What is a chiller HVAC? It's a large-scale refrigeration machine that cools water to typically 44–48°F, then pumps it to fan coil units throughout the building. Unlike direct-expansion systems where refrigerant travels to each zone, chillers keep refrigerant contained in the mechanical room. This makes them the standard choice for NYC office towers and hospitals where routing refrigerant across hundreds of zones would be impractical and code-restricted.

How do chillers work HVAC-wise? The chiller's compressor circulates refrigerant through an evaporator heat exchanger, where it absorbs heat from the building's chilled-water loop, cooling that water down. The refrigerant then moves to the condenser — air-cooled on rooftop units or water-cooled via a cooling tower — where it rejects the captured heat outdoors. Modern centrifugal and screw-type chillers use variable-speed drives to match compressor output to the building's partial-load demand, reducing energy use significantly during mild NYC shoulder-season days.

R-134a remains widely used in centrifugal chillers but faces an AIM Act phase-down starting in 2025 due to its high global warming potential (GWP of 1,430). R-513A and R-1234ze are lower-GWP drop-in or near-drop-in alternatives that major chiller manufacturers have already qualified. R-410A is used in scroll and screw chillers but is also being phased down. For new NYC chiller installations, specifying A2L or A1 low-GWP refrigerants future-proofs the equipment against tightening Local Law and EPA regulations over the next 10–15 years.

Well-maintained centrifugal chillers typically last 25–30 years; screw and scroll chillers run 20–25 years. Key maintenance tasks: annual eddy-current testing of condenser and evaporator tubes, semi-annual refrigerant analysis to detect moisture or acid, oil analysis every 2,000 operating hours, and balanced cooling tower water chemistry. In NYC's hard water environment, condenser tube fouling is one of the fastest ways to lose chiller efficiency and shorten service life.

EPA Section 608 requires facilities to repair refrigerant leaks in equipment containing 50 or more pounds of refrigerant within 30 days if the annual leak rate exceeds 20 percent for comfort cooling. NYC buildings must also comply with Local Law 87 energy audit requirements that flag refrigerant losses. Large chillers typically use automated leak detection sensors in the mechanical room, alarming building operations staff before enough refrigerant escapes to degrade system performance.

Need Help Planning Your Refrigerant Transition?

Our commercial HVAC engineers will audit your current chiller systems, model transition costs, and design a phased replacement plan that minimizes downtime and maximizes regulatory compliance.

Alex Weber