Leakage Totally Depends On Two Factors
No 1 Is How Good The Installer Was ...Did He Properly Flare Line set And Leak Test It Or You Are Being Lucky....In Both Cases...It Will RUn Till You Develop Any Physical Leak.......
no 2 Is How Good You Are Keeping Your Inner/Outer Clean And How Good Is Enviorment Around You ...Dusty Moist...This All Depends
For KHI Yes Clifton Defence Side Outers Rust Out Preety Much Bcz Of Too Much Moisture As Its Near To Sea....Other Areas Are Good...And If You Take Care Of Its Cleaning They Will Lost Longer Than Expected
Our People Here Have Tendency To Misuse Things & Then Throw Them Away.....in 75% Cases...Its Because Of Misuse Of UNIT Which Leads To Leakage/Compressor Damage...