The outcome of R290 as a drop in replacement of R22 has been reviewed in this paper. As per Montreal Protocol, R22 is going to be phase out due to its unfavorable impacts related to environment e.g. ozone depletion potential (ODP) and global warming potential (GWP). R290 has zero ODP and considerably GWP as compared to R22. The releasing of refrigerants in the surroundings becomes the cause of issues pertinent in environment. A detailed review about the experimental studies associated with the

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... erformance of R407C is provided. The aim is to put together all the diversified information about the R290 in a single paper. It is found after the careful observation that R22 performs somewhat better than R290 in many aspects i.e. COP, Cooling Capacity, Energy Consumption, and Exergetic Analysis but retrofitting point of view, it is best suitable refrigerant and R290 is suitable for new design.