Refrigerants’ operational carbon is an essential consideration in carbon neutral buildings. Integral Group’s guide can support teams make well-informed decisions in the design of refrigerant-based systems. Early consideration of refrigerants can impact ta building’s emissions for years to come. The guide reviews currently available refrigerants for common system types, with advice on how to reduce refrigerant charge, leakage, and enhance recovery at end of life. It should be considered ‘live’ and will be updated periodically to reflect the latest industry data.