How does this affect surfaces like walls, finished wood furniture and floors, plastic, paint, etc?

I imagine it will cause some material to off-gas aldehydes at the very least.

I worked for a germaphobe, and he put one of these ozone-injecting air purifiers in our tiny office. Every morning I would walk in and it felt like I was walking into a thunderstorm from the smell. No gunpowder, just thick ozone