Yes. Rooftop packaged HVAC equipment can be designed around R454B refrigerant.

However, R454B should only be used in equipment specifically designed for the refrigerant.

Why is R454B being used in rooftop HVAC equipment?

R454B has a lower global warming potential than traditional R410A and is one of the refrigerant platforms being adopted in newer HVAC equipment.

Is R454B a direct replacement for R410A in an old RTU?

No. An existing R410A rooftop unit should not simply be recharged with R454B. The refrigeration circuit, controls, components and safety design must be compatible with the selected refrigerant.

What should buyers check?

• Refrigerant platform
• Equipment certification
• A2L safety design
• Capacity and efficiency
• Electrical requirements
• Fresh-air options
• Fan performance and ESP