Refrigerators do not produce gas as a byproduct of their normal operation. Instead, they use a refrigerant to transfer heat from the inside of the refrigerator to the outside.

Refrigerants: These are typically fluids that evaporate and condense to absorb and release heat, facilitating the cooling process. Historically, refrigerants like chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) were used, but due to their ozone-depleting properties, they have been largely phased out.

Modern Refrigerants: Modern refrigerators commonly use refrigerants like hydrofluorocarbons (HFCs) or hydrocarbons (e.g., isobutane). While HFCs do not deplete the ozone layer, they are potent greenhouse gases, leading to the development of refrigerants with lower global warming potential.

Potential Leaks: If a refrigerator leaks refrigerant, it releases these gases into the atmosphere. This isn't "production" in the normal sense, but rather an accidental release. If a refrigerant leak is suspected, the appliance should be serviced by a qualified technician.

For more detailed information on refrigerants and their environmental impact, you can refer to:

• EPA on refrigerant sales restrictions