Maverick I too was worried about potential engine damage due extended idle times but was assured the Modular engines run lean enough at idle while holding sufficient oil pressure this isn't a problem as it would have been with similar V-8 motors.

In my case winter idle times are the most important for my business materials while on a job but the A/C issues I can't speak to at all.

I'm wondering if an outfit like RV or repair shop or snow plow upfitters wouldn't have something that bumps the idle up a bit, perhaps for running inverters or the like? I know they exist but where eludes me too.