Non-fluorinated refrigerants

Non-fluorinated refrigerants, or commonly called natural refrigerants, are substances used as refrigerants before 1950, which do not damage the ozone layer and whose global warming potential is zero or practically zero. The most used substances in commercial and industrial refrigeration are ammonia (R-717), carbon dioxide (R-744) and hydrocarbons (HC) such as isobutane (R-600a), propane (R-290), ethane (R-170) and propylene (R-1270).