Household refrigerators using hydrocarbon refrigerants such as propane (R290) or isobutane (R600a) are commonplace in many parts of the world, with the exception of North America.
However, this is changing: the latest announcement by the American Association of Home Appliance Manufacturers (AHAM) on the Safety Services for Household Appliances Using Combustible Refrigerants has revealed this trend.
“The guide was released because the industry is turning to a new type of refrigerant – non-HFC-based refrigerants and blowing agents that are not only more environmentally friendly, but are also widely used in Europe,†said AHAM spokesperson Sydney. Henderson said, "However, new refrigerants require changes in past service methods, so we have developed a service guide designed to train US home appliance personnel who may be dealing with such products for the first time."
The US appliance industry is turning to hydrocarbon refrigerants, and the rules recently proposed by the US Environmental Protection Agency (EPA) should be considered an acceleration factor. The US Environmental Protection Agency has proposed to increase the charge of hydrocarbon refrigerant from 57 grams to 150 grams.
AHAM's Safety Services for Household Appliances with Combustible Refrigerants: Recommended Practices include pre-job safety inspections, leak detection, cooling system maintenance, refrigerant charging and replacement, refrigerant removal, and after-sales service procedures.
The home appliances covered by this guide include refrigerators, freezers, ice machines, cold drinks machines, room and mobile air conditioners, and dehumidifiers. “The home appliance industry has begun to produce home appliances that use this new type of refrigerant,†wrote a statement from AHAM.
AHAM's guide notes that shifting to hydrocarbon refrigerants is part of the ongoing effort to produce the most efficient and environmentally friendly products in the appliance industry.
However, considering the flammability of hydrocarbon refrigerants, “Because home appliances with hydrocarbon refrigerants have entered the market, it is critical that those service and maintenance practitioners become familiar with this guide,†AHAM said.
Globally, most of the 100 million domestic refrigerators and freezers produced each year use R600a or similar refrigerants.
Since the US Environmental Protection Agency has set a limit of 57 grams for hydrocarbon refrigerants, the growth of domestic refrigerators using hydrocarbon refrigerants in the US market has been hampered. In Europe, the limit for hydrocarbon refrigerant charge in domestic refrigerators is 150 grams.
Although the US Environmental Protection Agency has approved the use of hydrocarbon refrigerants in air conditioners, it is stipulated that the charge limit of hydrocarbon refrigerants in air conditioners depends on parameters such as room area and lower combustion limit, but propane (R290) air conditioners still Did not enter the North American market. However, the increase in the global production of other R290 air conditioners indicates that this type of air conditioner has been welcomed worldwide. In India, local air conditioner manufacturer Godrej & Boyce has sold 350,000 R290 air conditioners since 2012.
Greenpeace has been advising the United States to increase the hydrocarbon refrigerant charge limit. The organization's “green freeze†technology – the use of hydrocarbon refrigerants instead of HFCs in the domestic refrigeration sector – has become popular worldwide.
“North America’s charge limit should be immediately harmonized with international standards,†said Janos Maté, senior adviser on Greenpeace’s policy business. “There are nearly 1 billion hydrocarbon refrigerators in the world operating safely, why North American consumers are deprived of purchases. The right to a climate-friendly refrigerator?"
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