The Refrigerant Impact Calculator in the LEED Credit Form lists default values for a number of the most common refrigerants (such as R-22, R-134a, and others). However, your building system may use a refrigerant that is not included in the list. If this is the case, select the “other” option in the calculator and consult with a qualified engineer or reputable source to determine the correct ODP and GWP values for your refrigerant.