Learn more about the US Department of Energy’s new regulations on energy reductions for commercial walk-in coolers and freezers, and how they may impact your business. Learn more about the US Department of Energy’s new regulations on energy reductions for commercial walk-in coolers and freezers, and how they may impact your business. The production and importation of R-22 ended as of January 1, 2020 but the use of existing inventories and reclaimed refrigerant is still allowed. Click here to learn more about your options.