4. Why include an ASHRAE refrigerant-design episode in an estimating list?

Episode 64 examines next-generation refrigerants in ground-source heat-pump design. It is useful background for recognising when an equipment change is a system-design question, not a text substitution. Publisher page

Use it for: identifying the data an estimator must pass to a technical reviewer when an alternative is proposed. Keep its specific application visible.

Limit: this is not a comprehensive guide to current EPA deadlines or every commercial HVAC installation. Use the EPA sector resources for the separate regulatory check.

Discussion prompt: “What would need re-approval if the proposed refrigerant or equipment changed?”