refrigerant

Ambient heat causes a refrigerant inside the heat pump to warm up and expand.

TFA forms when synthetic chemicals from other "forever chemicals" such as those found in pesticides and refrigerants are partially broken down.

One issue the refrigerant - the fluid that transitions back and forth from liquid to gas, in a process that transfers heat.

When it’s cold outside, the process is reversed: Heat from the chilly outdoor air is extracted and delivered indoors with the help of refrigerants and a compressor.

Methylene chloride will continue to be allowed to make refrigerants as an alternative to other chemicals that produce greenhouse gases and contribute to climate change, Freedhoff said.