To comply with Option 2, you’ll need to calculate the weighted impact of the following characteristics of all refrigerants used in your project: environmental impact (through destruction of the ozone layer and the concentration of greenhouse ga

To comply with Option 2, you’ll need to calculate the weighted impact of the following characteristics of all refrigerants used in your project: 

• environmental impact (through destruction of the ozone layer and the concentration of greenhouse gases in the atmosphere);
• coolant capacity and refrigerant charge (determined by equipment specs); 
• rate of refrigerant leakage (determined by equipment life);
• and end-of-life refrigerant loss (largely determined by equipment specs).