In this episode of the Building HVAC Science podcast, host Eric Kaiser is joined by Keith Gifford, Senior Global Product Manager at Penn Controls, for an in-depth discussion about the emerging use of A2L refrigerants in the HVACR industry. A2Ls are a new class of refrigerants classified by ASHRAE as mildly flammable and boast a significantly lower global warming potential (GWP) compared to traditional refrigerants. Keith shares his unique perspective, shaped by extensive experience across all major refrigeration components, to explain the challenges, opportunities, and safety considerations surrounding A2Ls.

Key topics include the design and engineering hurdles posed by A2Ls, such as material compatibility, flammability mitigation, and the development of leak sensors calibrated to specific refrigerants. Keith also addresses the impact on service technicians, building codes, and system designs, emphasizing the importance of industry-wide education to ensure safe and effective adoption. Finally, Keith reflects on the future of refrigerants, including the potential for CO2 and other environmentally friendly solutions, signaling that innovation in HVACR is far from over.

PENN Controls: https://www.penncontrols.com/

AHRI A2L Building Code map: https://www.ahrinet.org/a2l-refrigerant-building-code-map-us

SNAP Rule 26: https://www.epa.gov/system/files/documents/2024-05/snap-final-rule-26-factsheet.pdf

ASHRAE New Refrigerant Safety Designations and Classifications: https://www.ashrae.org/file%20library/technical%20resources/bookstore/factsheet_ashrae_english_november2022.pdf

Keith on LinkedIn: https://www.linkedin.com/in/keith-gifford-519bb73/

This episode was recorded in January 2025.