Another A/C all year round here too....

Not only is it best for demisting, and keeping your cool, it's also the best thing you can do for the system - running it keeps the seals lubricated, and reduces the chance of a leak developing.

I've had 2x VS commodores go more than 10 years without needing any A/C work. One got a minor top-up when it was 11, and that's it - still running perfect. Yet the neighbour's one failed after just 2 years, and they are constantly getting it regassed every summer. The difference? They don't run theirs unless it's a stinking hot day.