This is to avoid excess pressure drop in the lines and improve the recovery rate

Natural Sources contributes only 18% of the chlorine in the stratosphere. Remaining 72% is contributed by man made sources. Chlorine associated with natural sources generally dissolve in water / moisture and falls down unlike CFCs & HCFCs

Montreal Protocol regulates the production and use of CFCs, HCFCs, Halons, Methyl Chloroform and Carbon Tetrachloride.

Zeotrope mixture refrigerant blend consists of mixture of different refrigerants with different vapor pressures

Badly contaminated refrigerant shall be destroyed at an EPA approved reclaimed facility for a substantial fee.

Molecular weight of Refrigerants are higher than oxygen. Therefore they are heavier than air and can displace oxygen in closed rooms when leaked from equipment. This causes Asphyxia – meaning lack of oxygen and may cause headache, dizziness, unconsciousness and even death.

The ozone molecule containing three oxygen atoms is unstable and can react with Chlorine, Bromine, Nitrogen & Hydrogen

CFCs are highly stable at lower atmosphere. Lifetime of CFCs will be in the range of 20 to 100 years. Because of high stability it does not react at lower levels of atmosphere and reaches stratosphere where it reacts with Ozone thus depleting ozone layer.