A hot topic in the world of refrigeration and air conditioning continues to swirl around refrigerants and what refrigerants will take hold and be used now, besides HFCs, and what will supplant HFCs in the future. Some of the articles in this issue of FROSTlines look at these subjects.
Elsewhere in this FROSTlines is an item about a new website devoted to the use of water as a refrigerant for HVACR equipment. This goes along with the already commonly talked about natural refrigerants of ammonia, CO2, and HCs of which much has been written and will continue to be written.