Standard refrigerators, small water coolers, and small HVAC units with less than 0.5 pounds of refrigerant are not considered base building equipment and are exempt from the prerequisite. However, if you have larger versions of these pieces of equipment, like a large refrigerator or larger window air-conditioning unit, that has more than 0.5 pounds of refrigerant, you do need to address those in your refrigerant management plans. The key factor is not so much the equipment type, but the amount of refrigerant.