Forane^® 32 vs. Forane^® 454B: Which Refrigerant Is Best for Replacing R-410A?

• Forane^® 32 offers higher efficiency and cooling capacity than Forane^® 454B. 
• Forane^® 454B provides a closer pressure-temperature match to R-410A, making system redesign simpler for many OEMs. 
• Forane^® 454B has a lower GWP (465) than R-32 (675). 
• Both refrigerants are classified as A2L and require equipment designed for mildly flammable refrigerants. 
• Neither refrigerant is a drop-in replacement for existing R-410A systems.

What Is Forane^® 32?

Forane^® 32 is a single-component refrigerant increasingly used in residential and commercial air conditioning systems. It provides higher cooling capacity and energy efficiency than many alternative refrigerants and can operate with a lower refrigerant charge. Because Forane^® 32 operates at higher pressures than R-410A, equipment manufacturers typically need to redesign components to optimize system performance and safety. 

What Is Forane^® 454B?

Forane^® 454B is a near-azeotropic blend consisting primarily of R-32 and R-1234yf. It was developed as a lower-GWP alternative to R-410A while maintaining operating characteristics that closely resemble existing R-410A systems. This similarity can reduce the amount of redesign required when transitioning to new equipment platforms. 

Is Forane^® 32 Better Than Forane^® 454B?

The answer depends on the application.

Forane^® 32 may be the better choice when:

• Maximum energy efficiency is a priority
• Higher cooling capacity is desired
• Equipment manufacturers are developing new platforms optimized around R-32
• Reduced refrigerant charge is beneficial

Forane^® 454B may be the better choice when:

• A smoother transition from R-410A designs is preferred
• Existing component architectures are being adapted
• Lower GWP is a key decision factor
• OEM redesign resources are limited

Both refrigerants can support compliance with lower-GWP objectives while delivering strong HVAC performance. 

 

Is Forane^® 454B a Drop-In Replacement for R-410A?

No.

Forane^® 454B is not a drop-in replacement for R-410A. Existing R-410A systems were not designed with the safety requirements necessary for A2L refrigerants. Retrofitting R-410A equipment with Forane^® 454B is not permitted and can create compliance and safety concerns. Forane^® 454B is intended for new equipment specifically designed for A2L refrigerants. 

 

Can Forane^® 32 Be Used in Existing R-410A Equipment?

No.

Like Forane^® 454B, Forane^® 32 is intended for use in equipment specifically designed for A2L refrigerants. Forane^® 32 also operates at higher pressures than R-410A, requiring equipment components engineered for those conditions. Existing R-410A systems should not be converted to R-32. 

 

Which Refrigerant Has Lower Global Warming Potential?

Forane^® 454B has a lower GWP than Forane^® 32.

• Forane^® 32 GWP: 675
• Forane^® 454B GWP: 465

Organizations prioritizing the lowest available GWP may favor Forane^® 454B, while those focused on efficiency and capacity may find advantages in Forane^® 32. The optimal choice depends on regulatory considerations, application requirements, and system design objectives. 

Learn more about refrigerant GWP and the industry's transition to lower-GWP alternatives.

Regulatory Information

 

How to Choose Between R-32 and R-454B

When selecting a refrigerant for next-generation HVAC equipment, consider:

• Regulatory requirements
• GWP targets
• Efficiency goals
• Cooling capacity requirements
• System architecture
• Component compatibility
• Long-term product roadmap

For many OEMs, the decision comes down to a tradeoff between the performance advantages of Forane^® 32 and the R-410A familiarity offered by Forane^® 454B.