Ozone machine? I wouldn't need to worry about poisoning myself. I'm hoping - and some anecdotal evidence proves true - that the smoke damage may not really be that bad. Nothing in my neighbourhood actually burnt, and I made sure that the windows were tightly closed before I fled. The city has had some horrible air quality for a few days - apparently unable to even support life without a respirator mask, so not really sure what I'm going find when I get back. Probably the fridge contents are the biggest worry
The machine poses no danger, looks similar to a space heater. You can rent one at an equipment rental. it basically recycles the air thru filters. They use them in fires all the time. I used one to remove smoke smell from a car that was owned by a relative who "death boxed" in their car, smoked with all windows up all the time. Worked like a charm, took 3 days though non stop.
If your house was closed up you may have minimized it for certain, and yes they might have cut power so I would toss the contents of the fridge