Another dumb question

[Nilao]

Prostar a/c systems typically get opened at least once a year for thermistors. And the typical residential or commercial fixed units are not the same. Everything on a stationary fixed system is sealed. The compressor is sealed, all connections are brazed so with the exception of the adjustable TXV and Schrader valves it's not the same. Automotive systems are sealed via bolts, seals, o-rings etc. While I agree a system should be able to last for years I have yet to see one make more than about 5 before the condenser eats a pebble at 70 then leaks or road craters crack a line/seal/condenser and require the system to be repaired. Plus any small amount of moisture that may remain between 29 and 29.91 inches of vacuum will be absorbed by the dessicate in the filter dryer.