From ice harvesting to Low-GWP refrigerants

About this episode

The episode explores the history and evolution of refrigerants in HVAC systems, highlighting the transition to low-GWP alternatives.

In this episode of Taking the Temperature of HVAC, Jamie Kitchen sits down with John Broughton and Jorg Saar to explore the fascinating history of refrigerants—from harvested ice, water, ammonia, and CO2 to CFCs, HCFCs, HFCs, and today’s low-GWP alternatives. The conversation traces how refrigeration evolved from ice houses and early evaporative cooling to mechanical systems in homes, factories, ships, and supermarkets. Along the way, the team shares stories from the field, reflects on the rise and fall of refrigerants like R-12, R-22, R-11, and R-502, and discusses why the industry is once again adapting to a new generation of refrigerants, including propane, CO2, R-32, and A2Ls. It’s a practical, entertaining look at how the past continues to shape the future of HVAC—and why understanding refrigerant history matters more than ever.

People in this episode

Host: Jamie Kitchen

Guests: John Broughton, Jorg Saar

Topics covered

• history of refrigerants
• HVAC evolution
• low-GWP alternatives
• refrigeration technology
• environmental impact
• industry adaptation

Keywords

• refrigerants
• HVAC
• low-GWP
• environment
• technology
• history
• adaptation

Mentioned in this episode

Organizations: Danfoss Climate Solutions

Products: R-12, R-22, R-11, R-502, propane, CO2, R-32, A2Ls

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