HVAC Refrigerant Regulations and Compliance in New Hampshire

Refrigerant compliance sits at the intersection of federal environmental law, industry certification standards, and state-level contractor licensing, creating a layered regulatory environment that affects every technician, contractor, and building owner in New Hampshire. The phase-down of high-global-warming-potential (GWP) refrigerants under the American Innovation and Manufacturing (AIM) Act of 2020 has accelerated equipment transitions and tightened handling requirements across residential, commercial, and industrial HVAC sectors. This page maps the regulatory structure governing refrigerant use, recovery, and disposal as it applies to New Hampshire's HVAC service landscape, including federal mandates, certification requirements, and the practical boundaries that define compliant work. For broader context on how these rules interact with contractor qualifications, see NH HVAC Licensing Requirements.

Definition and scope

Refrigerant regulation in the HVAC context covers the purchase, handling, recovery, recycling, reclamation, and disposal of chemical substances used in refrigeration and air conditioning systems. Federal authority derives primarily from Section 608 of the Clean Air Act (40 CFR Part 82, Subpart F), which prohibits the knowing venting of ozone-depleting substances (ODS) and their non-exempt substitutes into the atmosphere. The AIM Act, signed into law in December 2020, extended EPA authority to manage the transition away from hydrofluorocarbons (HFCs) — refrigerants with high GWP values that contribute to climate forcing even though they do not deplete stratospheric ozone.

In New Hampshire, no separate state refrigerant statute supersedes federal EPA rules, meaning the federal framework is the operative compliance standard. However, New Hampshire's Office of Professional Licensure and Certification (OPLC) ties technician certification to HVAC contractor licensing requirements, so federal refrigerant credentials have direct state-level licensing consequences.

The scope of regulated refrigerants includes three primary categories:

1. Class I ODS — chlorofluorocarbons (CFCs) such as R-11 and R-12, fully phased out of production under the Montreal Protocol
2. Class II ODS — hydrochlorofluorocarbons (HCFCs) such as R-22, with U.S. production and import ended as of January 1, 2020 (EPA HCFC Phase-Out Overview)
3. HFCs subject to AIM Act phase-down — including R-410A, R-134a, and blends; EPA's 2023 Technology Transitions Rule under the AIM Act sets GWP thresholds and sector-specific transition schedules (EPA AIM Act rulemaking)

How it works

Federal Section 608 certification is the baseline requirement for any technician who purchases or handles refrigerants in quantities greater than trace amounts. The EPA administers four certification types:

1. Type I — small appliances (manufactured with 5 pounds or less of refrigerant)
2. Type II — high-pressure systems (R-22, R-410A, R-134a, etc.)
3. Type III — low-pressure systems (R-11, R-113, R-123, etc.)
4. Universal — all three categories combined

Certification is obtained by passing an EPA-approved proctored examination. There is no expiration or renewal requirement for existing Section 608 certifications earned before regulatory changes; however, technicians working with newly regulated HFC substitutes must confirm their existing certification scope covers the refrigerant class involved.

Recovery equipment must be certified by an EPA-approved laboratory (EPA-approved testing organizations). Technicians must recover refrigerant to required efficiency standards before opening or disposing of systems. Failure to recover constitutes a knowing venting violation, which carries civil penalties up to $44,539 per day per violation under the Clean Air Act penalty schedule (EPA Civil Penalty Policy).

The AIM Act phase-down operates through an HFC allowance allocation system. Producers and importers receive decreasing allowances over time, with an 85% reduction from the 2011–2013 baseline targeted by 2036 (EPA HFC Phasedown Rule). For cooling systems and heat pump systems installed or serviced in New Hampshire, this phase-down affects R-410A availability and pricing, driving equipment manufacturers toward lower-GWP alternatives such as R-32 and R-454B.

Common scenarios

Residential air conditioner servicing — Technicians servicing split-system air conditioners containing R-410A must hold at minimum Type II Section 608 certification, use certified recovery equipment, and document recovery prior to any system opening. R-410A remains legal to service in existing equipment but is subject to increasing supply restrictions as allowances tighten.

R-22 system maintenance — Systems still operating on R-22 (a Class II HCFC) can only be recharged using reclaimed or recycled R-22, since virgin production and import ended in 2020. Contractors sourcing R-22 must obtain it from EPA-certified reclaimers (EPA Certified Refrigerant Reclaimers list). For context on older system replacement decisions, see NH HVAC System Replacement Guide.

New construction equipment selection — Under the AIM Act Technology Transitions Rule, certain HFCs are restricted in new equipment by sector-specific compliance dates. HVAC equipment installed in new construction projects in New Hampshire must conform to applicable GWP limits based on the equipment category and the compliance date that applies to that sector.

Refrigerant disposal and disposal records — Cylinders and appliances containing refrigerant cannot be landfilled without prior recovery. Small appliance disposal (e.g., window units, dehumidifiers) requires recovery by a certified technician or at an approved facility.

Decision boundaries

The critical distinctions that define compliance versus violation in New Hampshire's refrigerant landscape track federal definitions precisely:

The boundary between ODS handling (governed by Section 608) and HFC management (governed by the AIM Act) matters practically: R-410A is not an ODS but is now subject to AIM Act allowance restrictions, so technicians and contractors operate under both regimes simultaneously in shops servicing mixed equipment fleets.

Contractor vs. technician responsibility — Section 608 places certification obligations on the individual technician, not the employing company. However, companies that direct employees to vent or mishandle refrigerants carry separate enforcement exposure under the Clean Air Act. New Hampshire contractors should review their internal documentation practices against EPA's recordkeeping requirements at 40 CFR §82.166.

For an integrated view of how refrigerant compliance intersects with permitting obligations in New Hampshire, see NH HVAC Permits and Inspections. Technicians working across commercial HVAC systems face additional recordkeeping thresholds under EPA's leak repair requirements for appliances with refrigerant charges above 50 pounds.

References

• EPA Section 608 Regulations — 40 CFR Part 82, Subpart F
• EPA HCFC Phase-Out Overview
• EPA AIM Act — Phasedown of Hydrofluorocarbons
• EPA Final Rule — Phasedown of HFCs: Establishing Allowances
• EPA List of Certified Refrigerant Reclaimers
• EPA-Approved Recovery and Recycling Equipment List
• [EPA Civil Penalty