Air Conditioner Refrigerant or Air Conditioner Freon Air conditioner refrigerant and human AC refrigerant has [been] known to cause health problem[s] and are toxic to human[are suggest the plural form, it would be "is" if it were singular], so don't [don't staying? how about don't BE staying] staying near any appliance that is leaking refrigerant. [actually, most refrigerants are nontoxic, and you'd never know if it was leaking.] What is air conditioner refrigerant? Air conditioning refrigerant is fluid that is use[d] in air conditioner industry. [Needs a bit more detail, here.] This substance [Which one? I know of at least two fluids which are used in AC.] is what absorbs the heat from indoor units to outdoor units. [Absorbs from indoor to outdoor? What's that mean?] Air conditioner compressor is the components that move the AC refrigerant from indoor units to outdoor units. However, it's the air conditioning refrigerant jobs to absorb the heat from what places that need to be cool. [Made my point. Get an editor.]