Question: what is the difference between 4 star and 5 star refrigerator?
Answer: But if we factor in the above observation the difference comes out to be 100-150 units per year. Which means a 3 star rated refrigerator will consume about 100-150 units more than a 4 star and similarly a 4 star rated refrigerator will consume 100-150 units more than a 5 star per year.