Final answer:
Hydrofluoroolefins (HFOs) are suitable for HVACR because they share the positive characteristics of CFCs and HCFCs, like being non-toxic and non-flammable, while having lower environmental impacts due to reduced ozone depletion potential and global warming potential.
Step-by-step explanation:
Hydrofluoroolefins (HFOs) refrigerants are a good fit for HVAC (Heating, Ventilation, Air Conditioning, and Refrigeration) systems for several reasons. They have been introduced as alternatives to chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs), which are known to be harmful to the ozone layer and have been phased out under environmental regulations like the Montreal Protocol. HFOs offer many of the positive characteristics of CFCs and HCFCs, such as being non-toxic and non-flammable, while having a significantly reduced potential for ozone depletion and a lower global warming potential. This makes them more environmentally friendly and suitable for use in modern refrigeration and air conditioning systems. Moreover, they are designed to be less stable in the atmosphere than their predecessors, meaning they are intended to decompose more readily and thus have a lesser impact on the environment.