The 2026 Rheem Refrigerant Mandate: R-454B and the A2L Era in the Ohio Valley
March 18th, 2026
4 min read
2026 HVAC Refrigerant Changes: What Homeowners Need to Know
Quick Answer:
Beginning January 1, 2026, all new residential HVAC systems must use low-GWP refrigerants instead of R-410A. Rheem systems now use R-454B, which reduces global warming potential by roughly 78%. These systems include Refrigerant Detection System (RDS) safety sensors and redesigned compressors required for the new A2L refrigerant standard.
Why the 2026 Refrigerant Mandate Exists
Quick Answer:
The EPA refrigerant transition replaces R-410A refrigerant (GWP ≈ 2,088) with lower-impact refrigerants like R-454B (GWP ≈ 466). This change reduces environmental impact while maintaining similar cooling performance for residential HVAC systems.
If you are shopping for a new Rheem furnace or air-conditioning system in Steubenville, Ohio or Weirton, West Virginia, the HVAC landscape looks different than it did just a few years ago.
As of January 1, 2026, the grace period allowing installation of remaining R-410A inventory officially ended. All newly installed residential HVAC systems must now use low global-warming-potential refrigerants.
For Rheem equipment, that refrigerant is R-454B, part of the A2L refrigerant category.
Even though your furnace burns natural gas, the cooling coil and refrigerant circuit operate as part of the same HVAC system. Because of that, modern Rheem systems now include safety technologies that older systems never required.
At Honest Fix Heating, Cooling & Plumbing, we work with these systems every day as a Rheem Pro Partner — an Authorized Rheem Service Provider. That means our technicians receive manufacturer training and follow Rheem installation and service standards for the latest refrigerant platforms.
The transition itself is driven by the American Innovation and Manufacturing (AIM) Act, which phases down high-GWP refrigerants nationwide.
What Refrigerant Does Rheem Use in 2026 Systems?
Quick Answer:
Rheem residential HVAC systems installed after 2025 use R-454B refrigerant, an A2L refrigerant with a global warming potential around 466, compared with 2,088 for R-410A. Rheem redesigned its Endeavor™ product line specifically for this refrigerant transition.
The new standard refrigerant across Rheem’s residential systems is R-454B.
R-454B is classified as an A2L refrigerant, meaning:
- Lower environmental impact
- Mild flammability classification
- Additional built-in safety monitoring
Its GWP rating is approximately 466, compared to 2,088 for R-410A. That reduction is why the HVAC industry transitioned to it.
You can verify certified system performance using the Air-Conditioning, Heating, and Refrigeration Institute directory:
This directory confirms:
- SEER2 efficiency ratings
- Approved refrigerant type
- Certified system matches
What Is the Rheem RDS Safety Sensor?
Quick Answer:
All Rheem A2L-compatible systems include an RDS (Refrigerant Detection System) sensor that monitors air near the indoor coil. If refrigerant concentration exceeds safe limits, the system automatically activates ventilation to dilute the refrigerant and prevent it from reaching a flammable level.
The Refrigerant Detection System (RDS) represents one of the largest design changes in modern HVAC equipment.
Every new Rheem furnace or air handler now includes a refrigerant sensor located near the indoor evaporator coil. The sensor continuously monitors the air around the coil.
If refrigerant concentration exceeds a safe threshold, the system automatically triggers a safety response. This is a required protection feature for A2L refrigerant systems.
Why Your Furnace Blower Might Suddenly Run at Full Speed
Quick Answer:
If the RDS sensor detects refrigerant, the furnace blower may automatically run at 100% speed. This safety process is called a dilution sequence, which circulates air through the system to reduce refrigerant concentration and prevent flammable conditions.
This behavior surprises many homeowners. Your furnace blower may suddenly run at full speed even when the thermostat is not calling for heating or cooling.
In many cases, that is not a malfunction. It is the dilution sequence.
When the RDS sensor detects refrigerant, the blower activates to move large volumes of air through the system. The purpose is simple: dilute the refrigerant concentration immediately.
Homeowner Protocol
If your system enters dilution mode:
- Do not reset the breaker
- Do not attempt to restart the system
- Call a licensed HVAC technician
A trained technician will inspect the refrigerant circuit and verify sensor operation.
What Happened to Federal HVAC Tax Credits in 2026?
Quick Answer:
Federal energy credits such as the 25C Energy Efficient Home Improvement Credit and 25D Residential Clean Energy Credit expired December 31, 2025. HVAC systems installed in 2026 generally no longer qualify for the previous $600–$2,000 federal tax credits.
Many websites still reference federal tax credits for HVAC equipment. Those incentives changed recently.
The One Big Beautiful Bill Act (OBBBA) accelerated the termination of several federal programs.
As of December 31, 2025, the following programs expired:
- 25C Energy Efficient Home Improvement Credit
- 25D Residential Clean Energy Credit
Are There Still Local Energy Incentives in Ohio?
Quick Answer:
Although federal HVAC tax credits expired, local utility programs still provide incentives. Some programs offer rebates for smart thermostats, energy audits, or income-eligible furnace replacements.
Local programs remain available in parts of the Upper Ohio Valley.
AEP Ohio
AEP offers $75 rebates on qualifying smart thermostats through its marketplace program.
https://www.aepohio.com/PowerRewards.aspx
Columbia Gas WarmChoice Program
This program may provide:
- Home energy audits
- Weatherization upgrades
- Furnace replacement assistance for income-eligible households
https://www.columbiagasohio.com/energy-efficiency/for-your-home/income-eligible-weatherization
These programs serve many households across Steubenville, Wintersville, Toronto, and Mingo Junction.
Rheem Refrigerant Transition FAQs
Can I still repair my old R-410A Rheem system?
Quick Answer:
Yes. The refrigerant mandate applies only to new HVAC installations, not repairs. Existing R-410A systems can still be serviced and repaired, although refrigerant prices may gradually increase as production decreases.
Replacement components such as compressors and coils remain available.
Is the new A2L refrigerant safe?
Quick Answer:
Yes. A2L refrigerants are classified as mildly flammable but extremely difficult to ignite. Modern HVAC systems include refrigerant detection sensors and automated ventilation safety protocols, which make them safe for residential use when installed properly.
Natural gas used in furnaces actually presents a greater ignition risk than the refrigerant itself.
How do I know my technician is trained for R-454B?
Quick Answer:
Technicians installing A2L systems should hold updated certifications such as NATE (North American Technician Excellence). Homeowners can verify certification online to confirm proper training.
Why are 2026 HVAC systems more expensive?
Quick Answer:
The transition to A2L refrigerants required new safety sensors, redesigned compressors, and updated electronics, increasing manufacturing and installation costs. Many systems cost 10–30% more than similar equipment before the refrigerant transition.
Major cost drivers include:
- Refrigerant detection sensors
- Redesigned compressors
- Upgraded control boards
- New refrigerant handling equipment
What guarantees do you offer?
Quick Answer:
Honest Fix protects homeowners with two major guarantees. New installations include a 15-year labor warranty, while repairs include a 5-year labor warranty, both backed by written service guarantees.
Lifetime Trust Shield — New System Installations
- 15-year labor warranty on HVAC installations
- 90-day full money-back satisfaction guarantee
- No-lemon replacement guarantee
- Energy savings guarantee
- Manufacturer warranty registration handled for you
Coverage requires annual maintenance to keep the system operating properly.
Service Trust Guardian — Repairs and Maintenance
- 5-year labor warranty on qualifying repairs
- 60-day money-back service guarantee
- No overtime charge guarantee
- On-time arrival guarantee
- Follow-up service protection
These guarantees ensure repairs are completed correctly and stand behind the work.
The Honest Fix Commitment
At Honest Fix, our installation teams are trained on the latest A2L refrigerant systems and safety procedures.
As a Rheem Pro Partner and Authorized Rheem Service Provider, we install and service Rheem equipment according to manufacturer commissioning standards.
Whether you live in Steubenville, Wintersville, Weirton, Follansbee, or Mingo Junction, our Comfort Guides will explain the 2026 refrigerant transition clearly so you can make the right decision for your home.
We also follow safety guidance from the Consumer Product Safety Commission when installing residential heating equipment.
You will always receive:
- A free exact quote
- Clear explanations of your options
- No pressure or upselling
Just honest answers.
Scott Merritt is a co-founder of Honest Fix Heating, Cooling and Plumbing and brings more than 30 years of experience across HVAC, leadership, and industry education. He serves in a senior leadership and oversight role, providing licensed guidance, reviewing HVAC educational content, and supporting technician training and documentation standards. Prior to co-founding Honest Fix, Scott founded and owned Fire & Ice Heating & Air Conditioning in Columbus, Ohio, which he operated for more than two decades before selling the company in 2025. During that time, he led programs and partnerships including Carrier Factory Authorized Dealer, Trane Comfort Specialist, and Rheem Pro Partner, helping establish high technical and training standards. Scott is the Ohio State HVAC license holder for Honest Fix and provides licensed oversight to help ensure work meets applicable codes and manufacturer requirements. Learn more about Scott’s background and role at Honest Fix by viewing his full leadership bio.
