Is it safe to leave the A/C installers in the house?

I am not sure if it’s safe to leave the Heating, Ventilation, and A/C installers in the house while the wife and I are gone next week.

I had to set an appointment a long time ago because they were so busy this season.

I believe they are busy and have a whole lot going on at this time of the year because of so many people paying to get their ACs diagnosed and tuned up before the weather gets super hot. Now that the temps are getting hotter and hotter, there’s no way that I am going to be able to last long without my central AC. When the AC tore up last week, I never dreamed that it was going to take so long to get an appointment to get it looked at. I believe my AC just picked the wrong time to tear up, though. The Heating, Ventilation, and A/C supplier that I usually rely on for all of my repairs and replacements was just entirely busy and so they couldn’t get to my repairs as early as they normally would… Usually they have a truly quick turnaround time. Anyway, they were supposed to be here in a couple of days, but the people I was with and I found out that the wife and I have to be out of town at the same time. I don’t want to reschedule because that will push myself and others back down to the bottom of their schedule, but I don’t know for sure if I should leave the installers in the house when the wife and I aren’t home, either. I mean, I recognize that they are trustworthy but I also don’t recognize any of them individually.

air conditioning system