Refrigerants and Energy Efficiency This video provides an overview of the new refrigerant requirements and how they will affect the HVAC systems as well as system efficiency. Contractors and installers,Mechanical, electrical, and plumbing engineers HVAC,IECC,refrigerants Related Videos 45:47 2024 IECC Sunrooms and Garages 1.01:03 2024 IECC Residential Existing Buildings 1:14:34 Blower Door and Duct Leakage Testing