Aircon Replacement Feedback (retaining Old Aircon Pipings)

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Hi buds,

I need feedback from pals here who have replaced their old aircons while retaining the old aircon pipes, preferably those who have previous R22 non-inverter aircons and have replaced to newer R410a inverter types (e.g. mitsubitshi electric). Have you guys experienced any problems so far?? Thks in advance.

[Chanel26 1]

How much cheaper is it to do it without the piping?

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not on pricing bro. just gathering feedback.