Refrigerants with better environmental performance are sometimes less efficient. Reducing cooling loads, and then using energy modeling to balance various concerns, is the ideal way to address this tradeoffs.
Using natural ventilation or other systems that don’t use refrigerants may it easier to achieve EAc4, but more difficult to establish an operating range that will meet the requirements of IEQc7.1 [CS-IEQc7].
Do you know which LEED credits have the most LEED Interpretations and addenda, and which have none? The Missing Manual does. Check here first to see where you need to update yourself, and share the link with your team.